making change for a dollar by jessica willison. mathematics lesson 1 st grade

Making Change For a Making Change For a DollarDollar

Making Change For a Making Change For a DollarDollar

By Jessica WillisonBy Jessica Willison

Mathematics Lesson

1st Grade

• Purpose:– To be able to count different numbers of coins

that add up to $1 and make change when given a dollar bill.

Each student should be able to do the following:

• Objectives:• Make change using coins for values up to one

dollar.• Model, represent, and explain addition as

combining sets and counting on.• Model, represent, and explain subtraction as

comparison, take-away, and part-to-whole.

Important Values To Remember

• Penny: A penny is worth 1 cent.– And it looks like this..

• Nickel: A nickel is worth 5 cents.– And it looks like this..

• Dime: A dime is worth 10 cents.– And it looks like this..

• Quarter: A quarter is worth 25 cents.– And it looks like this..

REMEMBER:

1 dollar = 100 cents

Back to Quiz

Why Do We Need to Make Change?

• It is important to know how to make change when buying items we like or need. We have

to count money when shopping at the grocery store, or buying gifts for our friends.

Help!

How Many Does It Take to Make $1?

• Since a penny is worth 1 cent, it takes 100 pennies to make

$1.

• Since a nickel is worth 5 cents, it

takes 20 nickels to make $1.

• Since a dime is worth 10 cents, it takes 10 dimes to

make $1.

• Since a quarter is worth 25 cents, it

takes 4 quarters to make $1.

How Do We Make Change?

• To make change for one dollar, we must use SUBTRACTION. – [We know 1 dollar is the same as 100 cents,

so we subtract the value we are paying from 100 cents.]

• For example, if we go to buy our friend a gift for 50 cents, we will subtract 50 cents from 100 cents.

» 100cents – 50cents = 50cents» [So, we are left with 50 cents after we pay using 1

dollar.]

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What Can We Expect?

• In the last problem we know we were left with 50 cents. What types of coins could we expect from the cashier if we are getting 50 cents? We can use SUBTRACTION again or ADDITION to solve this problem.

– We could have 2 quarters, because 1 quarter is 25 cents, and 50-25=25.

– We could have 5 dimes, because 10+10+10+10+10=50.

• There are many different types of coins we could receive that would add up to 50 cents!

Back to Quiz

For Extra Help and Learning More..

Change Maker. Retrieved from http://www.funbrain.com/cashreg/

Money Desk. Retrieved from http://www.apples4theteacher.com/java/counting/money.html

QUIZ TIME! What Have We Learned?

Please answer the following 3 questions [in the correct order]

to see what you have learned!

Question #1Question #2

Question #3

Question 1:

If we buy a pack of gum for 30 cents and pay using a 1 dollar bill, how much money should we get

back from the cashier?

70 cents

50 cents

20 cents

Question 2:What is one combination of coins that could add up to 70 cents and we could expect to get in return

after buying our gum?

7 pennies

1 quarter and 2 pennies

2 quarters and 2 dimes

Question 3:If I have 70 cents already, how

much more do I need to be able to trade my change in for a dollar

bill?3 Quarters

3 Dimes

3 Nickels

Correct!Great job! You figured out

the correct answer!

Question #1Question #2

Question #3

Try AgainI’m sorry but your answer is incorrect.

Please review this slide and try Question #1 again.

Try Again I’m sorry but your answer is

incorrect. Please review this slide and answer question #2 again.

Try AgainI’m sorry, but your answer is incorrect.

Please review this information and answer Question #3 again.