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Topic Practice makes perfect
Class
Description
Narrative
Susan helps her father, Mike, during a sale as the store assistant is absent.
They decide to create a magnificent tower of books that is sure to grab
people’s attention.
Math
In this class, students will be applying the concepts of multiplication and
division simultaneously to solve real-life problems. They will also learn to
solve multi-step problems involving multiplication and division using visual
models.
Class M2-G3-C15
Class Time 60 mins
Goal
● (-1) Recall: Solve word problems involving rupees and paise using
₹ symbol appropriately.
● (0) Core: Solve word problems involving multiplication and division
using an equation with a letter as an unknown in real-life contexts.
(3.OA.A.3)
● (+1) Advanced: Solve multistep word problems that require using
the four operations to solve the equation. (4.OA.A.3)
● (+2) Accelerate: Write simple expressions involving calculations,
and interpret numerical expressions. (5.OA.A.2)
Resources
Required
● Teacher Resources
○ Earphone with mic
○ Tablet-Stylus
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● Student Resources
○ Earphone with mic (optional)
○ Tablet-Stylus (optional)
○ Pen-Paper
Class Structure 1. Warm-Up
2. TA and SA
3. AA1, AA2, and AA3
(optional - basis student ability/time)
4. Create
5. Wrap-Up
1. 3 mins
2. 20-25 mins
3. 15 mins
(5 mins each)
4. 10-12 min
5. 3 mins
Use discretion
Start the video call from H2H
Warm-Up (3 min)
● Connect with the student
● Get the student to smile
Teacher Action Student Action
Ask the student to shift to full-screen mode.
Invite the parent to witness the class.
Hello, <...>!
How are you? How is your day shaping up?
Encourage the student to share about their day.
Show interest and curiosity without asking any
personal questions.
Student shares about their day.
Have you ever gone shopping? Do you know
anything that we shop has a cost? We need to
pay money to the shopkeeper to buy those
Some Response.
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things. Money comes in different shapes and
sizes. It comes in metal and in paper.We use
different currencies depending upon in which
country we live. We have learned Dollars and
cents in our previous classes. Today we will learn
about rupees and paise as well.
Let’s try solving this. If you buy 5 packs of
juice and each pack costs 20 rupees. How much
money will you pay to the shopkeeper?
Some response.
You will pay 100 rupees for 5 packs as each
pack costs 20 rupees .
Today, we shall do a lot of calculations that
involve money. we shall also see how both
multiplication and division help us in calculating
money.
Some response.
We will visit Mike’s shop today. He owns a
bookstore in Mathachussets and he is
conducting a sale today. Mike is
short-handed so Susan is helping her
father. She’s relying on you to make the
sale a success. Let’s join her and give our
best!
Core Concepts
● Recall (-1):Solve word problems involving rupees and paise using ₹ symbol
appropriately.. (2.MD.C.8)
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● Core (0): Solve word problems involving multiplication using an equation with a letter
as an unknown in real-life contexts. (3.OA.A.3)
● Advanced (+1): Solve multistep word problems posed with whole numbers and having
whole-number answers using the four operations, including problems in which
remainders must be interpreted. (4.OA.A.3)
● Accelerate (+2): Write simple expressions that record calculations with numbers, and
interpret numerical expressions without evaluating them. (5.OA.A.2)
Teacher Activity (10-15 mins) - THE BIG SALE BEGINS
Compulsory
● Initiate screen share by the student
● Allow the student to ‘do’ the activities
● Provide the support where needed
Student opens <Teacher Activity> in screen
share mode.
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Susan is helping her father in the store. Let’s
make Susan’s job easier by calculating the price
of the products. Your knowledge of the different
currency terms will be useful.
Student is excited by the storyline.
Are you ready to help her? Student response
Student clicks on the BEGIN button to start
the activity.
A group of young customers are shopping at
the store. They have many questions for
Susan. It’s her responsibility to clear all their
doubts. However, Susan feels unsure
because this is her first time working in the
store. She needs your help! Guide Susan
with your knowledge.
The cost of a car toy is 35 rupees. Can you
help the customer with calculation?
The student listens to the narrative.
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TA- Q1
Ask the student to read the question aloud.
What is the cost of a toy car? 35 rupees.
How much money does the customer tender? Customer tenders 3 five rupee coins
and 2 ten rupee coins.
We should find out how much money the
customer tendered in rupees. How many rupees
are there in 3 five rupee coins?
1 five rupee coin equals 5 rupees. So,
3 five rupee coins will be equal to 3 times 5
rupees. That will be 15 rupees.
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Take a snap of the whiteboard work using
or on top
right.
Keep asking the student if they can see the
whiteboard activity.
How many rupees are there in 2 ten rupee
coins?
1 ten rupee coin is equal to 10 rupees.
So, 2 ten rupee coins will be equal to 2
times 10 rupees.
That will be 20 rupees.
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Take a snap of the whiteboard work using
or on top
right.
Keep asking the student if they can see the
whiteboard activity.
Click on Add to Wallet to validate.
Yes, two times 10 rupees is 20 rupees. What
is the total amount that the customer tenders?
The total amount will be the sum of 15
rupees and 20 rupees. This totals to 35
rupees.
So, we know that the toy car is worth 35
rupees. The customer has 35 rupees too. Can he
purchase the toy car?
Yes.
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That’s right. We used both multiplication and
addition in this problem. First we converted 10
rupee coins and 5 rupee coins into rupees and
second we found the total rupees that we need
to purchase the car. Can you tell me which one
did we use for what?
Yes.
We used multiplication to convert
rupee coins to rupees and then used
addition to find the total rupees.
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TA- Q2
Ask the student to read the question aloud.
What is the cost of the book? 55 rupees.
How much money does the customer tender? 2 quarters of a hundred rupee.
What is the value of 2 quarters of a hundred
rupees?
One quarter of a hundred is equal to
twenty -five rupees. Then 2 quarters of a
hundred will be equal to 2 times
twenty-five rupees.
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Yes. 2 times twenty-five rupees can also be
written as 25 + 25. Right?
Yes. We can add 25 two times.
This totals to 50 rupees.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
Yes. Will the customer be able to purchase
the book?
Why?
No.
The cost of the book is 55 rupees and
the customer has only 50 rupees.
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Yes! Correct.
TA- Q3
Ask the student to read the question aloud.
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4 robot toys cost 64 rupees. What’s the cost
of each robot toy?
What is the cost of 4 toys? 4 toys cost 64 rupees.
Which mathematical operation will you use
to find the cost of one toy?
Division.
How do you know? 64 rupees are to be distributed equally
among 4 toys. Hence, we will use division.
Right. We have to find the cost of one toy?
Hence this is the unknown. How do you put the
unknown in any division equation?
We use an alphabet like “a” for the
same.
This is what we studied in our last class.
Can you write the division equation?
Yes. The division equation is
4 4 a6 ÷ =
64 is a bigger number to divide by 4. So, for
this division, we will use the area model. Do you
remember the method?
If the student does not remember the area
model, explain that the dividend is broken into 10
times the divisor and the remaining.
Yes. I remember.
How will we expand 64? I will expand 64 into 10 times 4 and
the remaining.
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Yes, let’s see how you will write it . 64 = 40 + 24
So, how will you calculate? 64 divided by 4 would be the sum of
40 divided 4 and 24 divided by 4.
Can you explain this on the WB? Yes.
4 4 0 4 6 = × 1 + × 6
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
So, what is 64 divided by 4.
It is 10 + 6. That is 16.
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Yes. So what is the cost of one robot toy? 16 rupees.
TA- Q4 Ask the student to read the question aloud.
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Susan has 7 sticky notes of each of the 3
colors. How many sticky notes does she have?
How many sticky notes of each color does
Susan have?
7
How many colors are there? 3
What mathematical operation would you use
to find out the total number of sticky notes?
Multiplication.
Yes, we would need to multiply sticky notes
of each color with the number of colors available.
Total number of sticky notes is unknown here.
3 a 7 × =
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Let us take that as “a”. Can you write the
multiplication equation?
This is how we write the multiplication
equation. What is the total number of sticky
notes?
It is 3 times 7 which is equal to 21.
So, what is the value of a? a = 21
This is how we identify the unknown in a
multiplication equation. Can you say that as a
sentence?
Seven multiplied by three is
twenty-one.
Probing question
When a number is multiplied by 1, what is
The number itself.
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the product?
That’s right. Any number multiplied by 1
gives the number itself as the product. What is
the product if one of the factors in the
multiplication equation is zero?
Any number multiplied by zero gives zero as the
product. Let me tell you another interesting
thing.
We have also studied that if we multiply a
number by a 10, then we write one zero at the
end. Similarly, if we multiply a number by a 100,
then we write two zeros at the end.
Let’s understand this on the WB.
Zero.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
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TA- Q5
Ask the student to read the question aloud.
How will you find the number of the
notebooks? Will you divide or multiply?
Divide.
Yes. We know each notebook costs 8 rupees.
We have to find out how many groups of 8 will
make 120 rupees. How will we find this?
We will find this by dividing 120 by 8.
We have to find the number of notebooks.
So, that is the unknown here. How will you write
the division equation?
20 a 1 ÷ 8 =
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That’s right. Let’s use the area model again
here. How will we expand 120?
I will expand 120 into 10 times 8 and
the remaining.
How will you write it as? 120 = 80 + 40
So, how will you calculate this? 120 divided by 8 would be the sum of
80 divided 8 and 40 divided by 8.
Can you explain this on the WB? Yes.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
So, what is 120 divided by 8? It is 10 + 5. That is 15.
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Yes. So how many notebooks can be bought? 15
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TA- Q6
Error analysis
Susan has 8 five rupee coins in one hand
and 9 five rupee coins in another. Does Susan
have more than a hundred rupee?
Ask the student to read the question aloud.
How many five rupee coins does Susan have
in total?
8 five rupee coins in one hand and 9 in
another hand.
We have to find out whether Susan has more
than 100 rupees.
We will first convert the five rupee
coins into rupees.
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How many rupees are there in 1 five rupee
coin ?
1 five rupee coin has 5 rupees.
So, how many rupees does Susan have? It would be the sum of 8 times 5 and 9
times 5. So, it would be 40 + 45 = 85
rupees.
So, does Susan have more than 100 rupees? No, she has 85 rupees which are less
than 100 rupees.
Probing question
We multiplied 5 with both 8 and 9 to get the
total rupees that Susan had. How else could we
have found this? Can we add the total five rupee
coins that Susan had and then find the answer?
Yes, the total 5 rupee coins Susan has
is 8 + 9= 17.
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So, how many rupees Susan has? It would be 17 times 5 rupees.
This is right. How would you find this out? I will break 17 into 10 and 7 and
multiply them with 5.
Can you show me on the WB?
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
Susan has 85 rupees. We added 8 and 9,
and then multiplied 17 with 5 to get 85. This is
the same answer that we had got after
multiplying 8 with 5 and 9 with 5 separately and
then adding them. Let me show this on a WB.
Take a snap of the whiteboard work using
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or on
top right.
Keep asking the student if they can see the
whiteboard activity.
With your help, Susan was able to guide the
customers and make their shopping experience
very pleasant. She is pleased to do her bit to
reduce her father’s workload,
<use this if the teacher moves to AA1>
However, she still has other tasks to handle at
the store so let’s continue supporting her!
<use this if the teacher skips to CA>
However, Mike and Susan haven’t started
working on the main attraction of the sale yet.
The tower of books will make their bookstore
incredibly popular.
Student Activity (10 mins) - THE SALE CONTINUES
● Optional, if the student has confidently solved all the problems in Teacher Activity
● Pick a maximum of 2 questions only. Choose questions corresponding to which student
struggled in the earlier activities
● Lead the student to solve the problems in these activities
Susan is getting the hang of assisting the
customers. However, she now has 2 tasks to
handle at the same time. She has to help more
customers and also keep the store organized.
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This is quite a challenge for Susan. Let’s see how
we can support her!
SA- Q1
One chocolate costs 50 rupees. Can a
customer buy one chocolate with 4 ten rupee
coins and 2 five rupee coins?
We know that it becomes easier to convert
all the currencies to one currency unit. Which unit
should we convert these to?
Rupees.
Why? It is easier to convert ten rupee coin
and five rupee coin to rupees.
How much money does the customer have?
The customer has 4 ten rupee coins
and 2 five rupee coins.
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This equals 4 times 10 and 2 times 5. How
much money does the customer have in rupees?
40 + 10= 50 rupees.
Click on Add to Wallet to validate.
What is the price of one chocolate in rupees? 2 quarters. This means 50 rupees.
So, does the customer have sufficient
money to buy a chocolate?
Yes, the customer has 50 rupees.
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That’s the right answer.
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SA- Q2
Error analysis
If a customer has 4 five rupee coins, can he
buy a gift card that costs 20 rupees? What do
you think?
We know that it becomes easier when we
convert all the currency units to one currency
unit. Which currency should we convert coins to?
Rupees
What is the cost of one gift card? 20 rupees.
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How much money does the customer have? 4 five rupee coins which are equal to
20 rupees.
So, does the customer have sufficient
money?
Yes.
That’s right.
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SA- Q3
42 books are divided equally in 3 drawers of
the shelf. How many books are there in one
drawer?
Which mathematical operation will we use
here?
Division.
Why? We will divide because 42 books are to
be distributed equally in 3 drawers of the
shelf.
What is it that we have to find here? The number of books in one drawer.
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So, that is the unknown. Let us take that as
“b”.
Can you write the division equation?
2 4 ÷ 3 = b
How will you find this? I will divide 42 into 10 times 3 and the
remaining. So, 42= 30 + 12
So what is the answer? 42 ÷ 3 will be equal to the sum of 30
÷ 3 and 12 ÷ 3. Hence it will be
10 + 4= 14
Student feeds the answer and presses the
next button.
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SA- Q4
The price of a teddy has been reduced by 2
rupees. If a customer buys 13 such teddies, how
many rupees will she save?
We know that during the sale, the prices are
generally reduced. How much does a customer
save per teddy?
2 rupees.
And how many teddies are being bought? 13
So, how much does the customer save in
total?
It will be 13 times 2.
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How will you write the multiplication
equation with an unknown here? Let’s take any
other letter as an unknown.
3 2 b 1 × =
What is the value of ‘b’? ”b” is the total savings made by a
customer in buying 13 teddies.
How will you solve this? Let’s first split the
numbers into tens and ones. Show it on the WB.
I will break 13 into 10 and 3. Total
savings will be 10 ✕ 2 and 3 ✕ 2. Hence
the answer will be 26 rupees.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
Student inputs the answer and clicks on the
check. Moves to the next screen.
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So we know that she saved 26 rupees. How
do we find the paise she saved?
We know that ₹1 = 100 paise. So, she
will save 26 × 100 paise.
How many paise saved? We have learnt that the product of
numbers multiplied by 10 gets one 0 at the
end or unit place. Here we are multiplying
by 100 so the number gets two 0’s at the
end.So, 26 × 100 = 2600.
She saved 2600 paise.
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Yes. You’re correct.
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SA- Q5
Susan wants to organise the pens by packing
them in the packets.
84 pens were packed equally into 7 packets.
How many pens were packed in each packet?
How will you find the number of the pens in
each packet? Will you divide or multiply?
Divide.
How do you know? 84 pens are being equally packed in 7
packets. Hence we will use division.
We have to find the number of pens in each
packet. So, that is the unknown here. How will
you write the division equation using a letter as
an unknown? Choose any letter of your choice.
4 m 8 ÷ 7 =
Let’s use place value again. How will we
expand 84?
I will expand 84 into 10 times the
divisor and the remaining.
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Right. How will you write it as? 84 = 70 + 14
So, how will you calculate this? Instead of dividing the number 84, I
would divide the number 70 and 14 with 7.
Can you explain this on the WB? Yes.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
So, what is 84 divided by 7. It is 10 + 2. That is 12.
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Yes. So, what is the value of “m” in the
division equation ?4 m 8 ÷ 7 =
m = 12.
How many pens will be kept in each packet? 12 pens.
Absolutely right.
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SA- Q6
A crayon pack has 6 small crayons worth 4
rupees (₹ 4) each and 6 big crayons worth 7
rupees(₹ 7) each. What will be the cost of the
crayon pack?
How will you find the total cost of a crayon
pack?
It will be the sum total of the cost of
the small crayons and the big crayons.
Help me understand this on the WB. Cost of the small crayons will be 6
times 4 and the big crayons will be 6 times
7.
So, what will be the total cost?
It will be 24 + 42 = 66 rupees.
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Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
Well done. Student fills the input boxes and clicks on
the CHECK button to move to the next
screen.
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Susan is very lucky to have you by her side! With
your Math knowledge, she was able to handle
everything The customers are shopping happily
and the shelves also look neat and organized.
The sale is going as planned, thanks to you!
<if the teacher moves to AA1>
The sale is not over yet. Susan and her father
still have to complete a lot of work. The store will
only get busier as the day goes on. Will you
continue to help her?
<if the teacher skips to CA>
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Mike and Susan haven’t started working on the
main attraction of the sale yet. The tower of
books will make their bookstore incredibly
popular in Mathachussets.
Advanced Activity
Concepts
● (+1) Advanced: Solve multistep word problems that require using the four operations
to solve the equation. (4.OA.A.3)
Advance Activity 1 (5 mins) - FREEBIE TIME!
Optional
● +1 and +2 above the grade level
● Start, only when more than 15 minutes on the clock
● Skip to Create Activity if only 10 minutes left
Q1: Teacher-Led
As the sale progresses, Susan decides to
treat the customers to freebies. She is eager
to know the number of items remaining on
the shelf. Let’s find out!
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AA1- Q1
Cost of one teddy is ₹2 and that of one toy
train is a quarter of one rupee. What amount of
money should the customers pay for 2 teddies
and 3 toy trains?
Student reads the question aloud.
What is the cost of 1 teddy?
₹2.
What is the price of 2 teddies in paise?
It will be ₹4. This implies
paise00 00 4 × 1 = 4
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What is the cost of 1 toy train?
1 quarter of one rupee = 25 paise.
What is the price of 3 toy trains in paise?
It will be 3 times 25 paise which is 3
quarters.
How many paise are 3 quarters equal to?
3 times 25.
How will you find out 3 times 25? You know
one way to multiply is also to add the same
number again and again. ?
Repeated addition.
That’s right. Let us add 25 three times to
know what is 3 times 25.
25 + 25 + 25 = 75. Hence, 3 quarters
are equal to 75 paise.
So, what is the price of 2 teddy and 3 toy
trains?
It will be 00 5 75 paise 4 + 7 = 4
That’s right! Which two mathematical
operations did we use in this question?
We used multiplication to convert the
rupees and the quarters of a rupee to paise
and used addition to find the total money
required.
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Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
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Brilliant. Let’s go to the next question.
Student clicks on NEXT button to go to next
screen
Q2: Student-Led
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AA1- Q2
15 general knowledge books, each worth ₹1,
10 comic books, each worth 1 quarter of one
rupee, and 12 superhero posters, each worth 20
paise have been kept on a shelf. What is the
value of the items on the shelf?
Here, we see that all items have their costs
mentioned in different currency units. So, we
should first convert all these into common
currency units. Which currency unit should we
convert all these to?
paise
It is easier to convert rupees to paise. What
is the cost of 15 general knowledge books in
paise?
Cost of general knowledge books will
be 15 times ₹1 which is ₹15. This is equal
to 15 00 500 paise ₹ × 1 = 1
What is the cost of 10 comic books in paise? Each comic book costs 1 quarter of a
rupee(25 paise). So, 10 books will cost 10
quarters of one rupee. This is
paise.0 5 50 1 × 2 = 2
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And what is the cost of 12 superhero posters
in paise?
Each superhero poster costs 20 paise.
So, 12 superhero posters will cost
paise.2 0 40 1 × 2 = 2
Right. We have converted all three into
paise. What should we do now?
We should add the costs of general
knowledge books, comic books, and
superhero posters.
What is the total cost? Total cost 500 50 40 990 paise = 1 + 2 + 2 = 1
Student inputs the values and clicks on
CHECK and then clicks NEXT to go to the
next screen.
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51
Susan’s customers are really happy with all the
freebies that you distributed.
<skip to CA>
It’s time to create the main attraction of the sale!
Susan and Mike need your knowledge of Math to
build an amazing tower of books!
<moving to AA2>
Many customers are now visiting the store. The
shelves have now become messy after the
customers have picked the items that they
wanted. Let’s see how Susan makes the shelves
look neat!
Advance Activity 2 (5 mins) - MESSY SHELVES
Optional
● +1 and +2 above the grade level
● Start, only when more than 15 minutes on the clock
● Skip to Create Activity if only 10 minutes left
Many people have visited the store and gone through the shelves while shopping. Susan
notices that the shelves look messy now. She decides to get them packed in a pencil case and
gift bundle.
Q1: Teacher-Led
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52
AA2- Q1
A pencil case will have an eraser, 3 pencils,
and a few pens. The price of an eraser and a
pencil is 5 rupees each. If one pen costs 10
rupees, how many pens should Susan put into
the box?
<Press open to get to next page>
What do we have to find here? We have to find the number of pens in
the box.
What is the total sale price of the box? 6 ten rupee coins.
Do we know what items are there in the
box?
Yes. It has an eraser, 3 pencils, and a
few pens.
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53
So, what is the price of 1 eraser and 3
pencils put together?
Eraser and pencil are worth 5 rupees
each. So, 1 eraser will cost 1 five rupee
coin and 3 pencils will cost 3 five rupee
coins . So, an eraser and 3 pencils will cost
4 five rupee coins in total.
Let us convert these into total rupees. 4 five rupee coins are equal to 20
rupees.
What is the cost of the pencil case in rupees? 6 ten rupee coins, which is equal to 60
rupees.
An eraser and 3 pencils cost 20 rupees. What
is the remaining amount?
60 - 20= 40 rupees
What is the cost of a pen in rupees? 10 rupees.
So, how many pens will come for 40 rupees?
I will divide 40 by 10 to find this out. It
will be 0 10 4 pens 4 ÷ =
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54
Student completes the input boxes and
clicks the NEXT button to go to the next
screen.
Probing question
A customer has 2 hundred rupee notes. If
she purchases 3 such pencil cases, how much
money will she be left with?
How much money does the customer have in
rupees?
How much money will she be left with?
One pencil case costs 60 rupees. So 3
such cases will cost 180 rupees.
2 hundred rupee notes. This equals
200 rupees.
It will be 200 - 180= 20 rupees.
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55
This is right. Let’s move to the next question.
Q2: Student-Led
AA2- Q2
A bundle consists of one book worth ₹100,
one pencil is worth 4 ten rupee coins, and gift
cards worth 10 rupees each. For the price of the
bundle to be ₹200, how many gift cards should
be kept in the bundle?
What do we have to find here? We have to find the number of gift
cards in the bundle.
What is the price of the bundle? ₹200.
Do we know what items are there in the
bundle?
Yes. It has a book, a pencil and a few
gift cards.
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56
Let us change all the prices to rupees. What
is the price of the book?
100 rupees.
What is the price of the pencil in rupees? 4 Ten rupee coins equals 40 rupees.
What is the price of the book and the pencil
in the bundle?
100 + 40 = 140 rupees
What is the price of the bundle? 200 rupees.
The book and the pencil in the bundle cost
140 rupees. What is the remaining amount?
rupees00 − 140 0 2 = 6
What is the cost of a gift card in paisa? 2 Five rupee coins equals 10 rupees.
So, how many gift cards of 10 rupees each
will come in 60 rupees?
I will divide 60 by 10 to find this out. It
will be 0 10 6 gif t cards 6 ÷ =
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57
That’s right.
The shelves look very neat now.
<if the teacher moves to AA3>
Next, Susan has to handle another new task in
the bookstore. What could this be? Let’s find out!
<if the teacher skips to CA>
It’s time to create the main attraction of the sale!
Susan and Mike need your knowledge of math to
build an amazing book tower!
Advance Activity 3 (5 mins) - SUSAN- THE NEW SHOPKEEPER
Optional
● +1 and +2 above the grade level
● Start, only when more than 15 minutes on the clock
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58
● Skip to Create Activity if only 10 minutes left
Mike takes a break to have lunch, so Susan takes his place at the billing counter. She is
taking care of the bills now. However, she’s finding it hard to write down the items
purchased. Let’s help her out!
Q1: Teacher-Led
AA3- Q1
A stationery set contains a pencil, a pen, and
a pack of wax colors. A pencil costs 4 rupees. A
pen costs 8 rupees, and a pack of wax colors
costs 20 rupees. What is the numerical
expression to calculate the cost of 4 such
stationery sets?
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59
Today we will learn a new concept. It is called
Numerical Expression.
The term numerical expression is made up of two
words, numerical meaning numbers, and
expression meaning phrase. Thus, it is a phrase
involving numbers. It is a mathematical
statement involving only numbers and one or
more operations like addition subtraction
multiplication and division.
Let’s see some numerical expressions on the WB.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
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60
Numerical expressions do not contain any “equal
to” sign. Let us understand the parts of the
expression on the WB.
Take a snap of the whiteboard work using
or on top
right.
Keep asking the student if they can see the
whiteboard activity.
Ok. Let’s come back to the question now.
What do we have to answer?
What is the numerical expression to
calculate the cost of 4 stationery sets?
What is included in one stationery set? A pencil, a pen, and a pack of wax
colors.
And, we know their prices too. A pencil costs
4 rupees. A pen costs 8 rupees, and a pack of
wax colors costs 20 rupees. So, what is the
It will be 4 + 8 + 20 rupees.
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61
numerical expression to calculate the cost of one
stationery set?
We now know the cost of one stationery set.
How will we find the cost of 4 such stationery
sets?
Cost of three stationery sets would be
equal to 4 times the cost of one stationery
set.
In a numerical expression, we will put the
cost of one stationery set in brackets. The
bracket is used to group the expression as one.
Can you write the numerical expression to find
the cost of 4 stationery sets?
Yes. It will be 4 times (4+ 8 +20)
rupees.
Take a snap of the whiteboard work using
or on
top right.
Keep asking the student if they can see the
whiteboard activity.
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62
I see you understand how to write the
numerical expressions now. Let’s go to the next
question.
Q2: Student-Led
AA3- Q2
Susan wants to note down the amount of
money collected from the sale of 325 books, 80
soft toys, and 53 flower pots. If each item was
sold for ₹2, write down the numerical expression
to calculate the total money collected.
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63
We know how to write the numerical
expressions now. What expression will you write
first?
I will find out the total number of items
sold.
How many items were sold? It will be 325 + 80 + 53.
That’s correct. Do we know the price at
which these items were sold?
Yes. Each item was sold for ₹2.
So, what is the numerical expression to find
out the total money collected?
It will be 2 ✕ (325 + 80 + 53).
Absolutely right! Well done!
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64
Susan was able to handle all the demanding
tasks, thanks to you! Mike returns from his break
and joins Susan. Now they are all set to start
building the book tower.
Create Activity (10-12 mins) - BOOK TOWER
Compulsory
Mike and Susan want the sale to be an
unforgettable experience for the customers. They
create a magnificent book tower that is sure to
grab people’s attention. This will make their
bookstore stand out as the most unique one in
Mathachussets.
A book tower is made by placing books on top of
each other. Stack the books with your knowledge
of math!
Student starts the activity.
Step 1
Susan wants to put the books on different levels
now. Hardbacks will be kept at the bottom and
paperbacks will be kept on upper levels of the
tower. Help her decide that.
Select the number of levels for hardbacks.
(between 3 or 4)
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65
Step 2 :
Select the number of hardbacks (5/6) and
paperbacks (8/9) on each level and find out the
total numbers and their cost.
How many hardbacks will be there in the
tower?
If the cost of a hardback is 5 rupees, what is
the cost of them all?
How many paperbacks will be there in the
tower?
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66
If the cost of a paperback is 2 rupees, what
is the cost of them all?
Step 3
To decorate the book tower, Susan picked some
ribbons and a few stickers.
Susan picked 126 bookmarks. If she sticks
them equally on each level, how many ribbons
will she stick on one level?
Step 4
Susan wants to place a toy train track around the
book tower. She joins tracks to create a big track
which will cover the bottom levels of the tower.
Click on ADD THE TRACK
The book tower is ready for DOWNLOAD!
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67
Students who have done any of the advance activities will proceed to the next step. (+1)
Step 5:
To make the tower look attractive, Susan decides
to put a toy on the top of the tower. Drag the toy
onto the top.
Step 6:
What will the numerical expression be if we want
to make 2 such book towers?
Step 7:
Download your book tower.
You did it, <student’s name>!
The tower stands tall. A huge crowd
gathers at the store to take a look at your
wonderful creation! Susan and Mike are
incredibly happy because their bookstore is
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68
popular now in Mathachussets. More
importantly, Susan is feeling satisfied
because she was able to support her father
in the time of need.
Student stops screen share
Wrap-Up (3 mins) - ‘Name of the Activity’
Compulsory
● Reflection
● Summary
● Hats off
Can you recollect what you learned today?
Share the Wrap-Up screen with the student.
What was the wow moment in the class for
you?
You did great today!
We learned:
1. to solve word problems involving
rupees and paise using ₹ symbol
appropriately.
2. to solve word problems involving
multiplication and division equations
with a letter as an unknown.
3. to solve problems with more than
one mathematical operation.
Student response.
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69
(Give at least 2 hats off)
I’m so glad that you focused throughout the
class. Hats off for strong concentration.
Press the Hats Off icon for Strong
Concentration.
I liked the way you solved division and
multiplication equations with a letter as an
unknown.
Press the Hats Off icon for Creatively Solving
Activities.
All the questions you asked during the class let
me know that you were thinking through the
activities.
Press the Hats Off icon for Great Question
I’m super excited to continue the learning
journey with you! Remember to take the quiz and
complete your worksheets before the next class.
See you soon!
Teacher clicks
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70
GeoGebra Links
Activity Activity Name GeoGebra Link
TA The Big Sale Begins! https://www.geogebra.org/m/jprwn8
ue
SA The Sale Continues https://www.geogebra.org/m/wakpy
28k
AA1 Freebie Time! https://www.geogebra.org/m/c2avuc
ts
AA2 Messy shelves! https://www.geogebra.org/m/sf8rsqq
f
AA3 Billing counter https://www.geogebra.org/m/nfdcx6
zn
Create Design a book tower https://www.geogebra.org/m/uwjzd6
s7
Quiz Activity
(post-class)
QA https://www.geogebra.org/m/as5uug
8e
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71
Wrap up Key Learnings https://www.geogebra.org/m/tsecne
bu
Glossary
Word Meaning Image
Billing counter the place in a store where people pay for the
things they buy.
Book tower many books placed on top of each other to
create an attractive design.
Bundle a group of things fastened or held together.
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72
Convert to change something.
Currency a system of money that is used in a particular
country.
Demanding something that needs a lot of time and energy
to complete.
Freebie something that is given for free.
Gift card a card that can be exchanged at a store for
items that are priced within its value.
Hardback a book that has a stiff cover.
Hitch a temporary difficulty that causes a short delay.
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73
Numerical
expression
a mathematical sentence that has only numbers
and operation symbols.
Paperback a book with a cover made of thick paper.
Sale when many items at a store are sold at a
discount.
Stationery the items that are needed for writing.
Sticky note a small paper that is sticky on one side.
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74
Tender to give something.
Wallet a small folding case for carrying money and
bank cards.