Sandra MacDonald 2006Sandra MacDonald 2006

Multiply your Multiply your chances!chances!

Terrible 2s, 4s & 5s

Simple 6s & 7s

Everyone 8s & 9s

2-digitdilemnas

Multiplyyour money

Q $100

Q $200

Q $300

Q $400

Q $500

Q $100 Q $100Q $100 Q $100

Q $200 Q $200 Q $200 Q $200

Q $300 Q $300 Q $300 Q $300

Q $400 Q $400 Q $400 Q $400

Q $500 Q $500 Q $500 Q $500

Last Chance

$100 question from Terrible 2s, $100 question from Terrible 2s, 4s & 5s4s & 5s

$100 answer from Terrible 2s, $100 answer from Terrible 2s, 4s & 5s4s & 5s

2 x 6 = 12

$200 question from Terrible 2s, $200 question from Terrible 2s, 4s & 5s4s & 5s

0 5 10 15 200 5 10 15 20

A multiple of five that is greater than 22

$200 answer from Terrible 2s, $200 answer from Terrible 2s, 4s & 5s4s & 5s

25, 30, 35, 40….Any number greater than 22 that you say when you skip count by 5

$300 question from Terrible 2s, $300 question from Terrible 2s, 4s & 5s4s & 5s

Ed has saved $7. Toby has saved four times as much. How much has Toby saved?

$300 answer from Terrible 2s, $300 answer from Terrible 2s, 4s & 5s4s & 5s

4 x $7 = $28

Toby has saved $28.

$400 question from Terrible 2s, $400 question from Terrible 2s, 4s & 5s4s & 5s

If there are 22 students in a classroom, how many shoes will they be wearing?

$400 answer from Terrible 2s, $400 answer from Terrible 2s, 4s & 5s4s & 5s

22 x 2 = 4422 x 2 = 44

Each student wears two Each student wears two shoes; in all there will be shoes; in all there will be

44 shoes.44 shoes.

$500 question from Terrible 2s, $500 question from Terrible 2s, 4s & 5s4s & 5s

If there is chocolate and vanilla ice cream with plain and sugar cones, how many different double scoop cones can you have?

$500 answer from Terrible 2s, $500 answer from Terrible 2s, 4s & 5s4s & 5s

Plain conePlain cone Sugar coneSugar cone

1.1.Choc-chocChoc-choc

2.2.Choc-vanChoc-van

3.3.Van-vanVan-van

4.4. Choc-chocChoc-choc

5.5. Choc-vanChoc-van

6.6. Van-vanVan-van

$100 question from Simple 6s & $100 question from Simple 6s & 7s7s

.

$100 answer from Simple 6s & $100 answer from Simple 6s & 7s7s

7 x 6 = 42

$200 question from Simple 6s & $200 question from Simple 6s & 7s7s

How many legs are there on 8 spiders?

$200 answer from Simple 6s & $200 answer from Simple 6s & 7s7s

One spider has 8 legs. 8 x 8 = 64Eight spiders have 64 legs.

$300 question from Simple 6s & $300 question from Simple 6s & 7s7s

Jacqueline biked 6 km per hour. At this rate, how far did she bike in 5 hours?

$300 answer from Simple 6s & $300 answer from Simple 6s & 7s7s

Each hour she biked 6km6km x 5 hours = 30.

Jacqueline biked 30 km.

$400 question from Simple 6s & $400 question from Simple 6s & 7s7s

How many days are there in nine weeks?

$400 answer from Simple 6s & $400 answer from Simple 6s & 7s7s

7 days x 9 weeks = 63 days

$500 question from Simple 6s & $500 question from Simple 6s & 7s7s

How is 6 x 7 different from 7 x 6?

$500 answer from Simple 6s & $500 answer from Simple 6s & 7s7s

6x7 means six groups of seven7x6 means seven groups of six

Six groups of seven could be six weeks with seven days in each

week. Seven groups of six would not be

days of the week.

$100 question from $100 question from Everyone loves 8s & 9sEveryone loves 8s & 9s

$100 answer from Everyone $100 answer from Everyone loves 8s & 9sloves 8s & 9s

8 x 5 = 40

$200 question from $200 question from Everyone loves 8s & 9sEveryone loves 8s & 9s

0 9 180 9 18

The third multiple of 9

$200 answer from Everyone $200 answer from Everyone loves 8s & 9sloves 8s & 9s

9, 18, 27

$300 question from $300 question from Everyone loves 8s & 9sEveryone loves 8s & 9s

Are there more odd or more even multiples of nine? Explain how you know.

$300 answer from Everyone $300 answer from Everyone loves 8s & 9sloves 8s & 9s

9, 18, 27, 36, 45, 54, 63, 72, 81Multiples of nine alternate between odd and even, so there are the same number of even and odd multiples.

$400 question from $400 question from Everyone loves 8s & 9sEveryone loves 8s & 9s

How can you use what you know about multiplying by four to help you multiply by eight. Give an example.

$400 answer from Everyone $400 answer from Everyone loves 8s & 9sloves 8s & 9s

8 is 2 x 4, or double four so if you know that 4 x 5 = 20, then 8 x 5 is 2 x 20 or double 20.

$500 question from $500 question from Everyone loves 8s & 9sEveryone loves 8s & 9s

Create a story problem to tell about 8 x 9. Explain how you would figure out the answer.

$500 answer from Everyone $500 answer from Everyone loves 8s & 9sloves 8s & 9s

Story problems must make sense!

$100 question from 2-digit $100 question from 2-digit dilemnasdilemnas

$100 answer from 2-digit $100 answer from 2-digit dilemnasdilemnas

5 x $2 = $10

$200 question from 2-digit $200 question from 2-digit dilemnasdilemnas

$200 answer from 2-digit $200 answer from 2-digit dilemnasdilemnas

3 x 30 = 90

$300 question from 2-digit $300 question from 2-digit dilemnasdilemnas

$300 answer from 2-digit $300 answer from 2-digit dilemnasdilemnas

4 x 311 = 1244

$400 question from 2-digit $400 question from 2-digit dilemnasdilemnas

If a bag of cat food costs $3.99, how many bags will you be able to buy with $20?

$400 answer from 2-digit $400 answer from 2-digit dilemnasdilemnas

$3.99 is almost $4.5 x $4 = $20If you thought about the tax you’ll know you only have enough money to buy four bags!

$500 question from 2-digit $500 question from 2-digit dilemnasdilemnas

Use digits 2, 4 and 5 in two different ways to calculate different answers:

x

$500 answer from 2-digit $500 answer from 2-digit dilemnasdilemnas

24 x 5 = 12025 x 4 = 10042 x 5 = 10545 x 2 = 9052 x 4 = 20854 x 2 = 108

$100 question from Multiply $100 question from Multiply your moneyyour money

$100 answer from Multiply $100 answer from Multiply your moneyyour money

4 x 10¢ = 40¢

$200 question from Multiply $200 question from Multiply your moneyyour money

$200 answer from Multiply $200 answer from Multiply your moneyyour money

3 x 25¢ = 75¢

$300 question from Multiply $300 question from Multiply your moneyyour money

How much would you have to pay to buy four bottles of water if each bottle cost $1.25?

$300 answer from Multiply $300 answer from Multiply your moneyyour money

4 x $1.25 = $5.00

$400 question from Multiply $400 question from Multiply your moneyyour money

Is this enough money to buy something at the dollar store? Explain your

answer.

$400 answer from Multiply $400 answer from Multiply your moneyyour money

20 x 5 ¢ = $1.00, but there is tax on items at the Dollar Store,so it is not enough money.

$500 question from Multiply $500 question from Multiply your moneyyour money

How many quarters do you need to make $7.00? How can you use multiplication to find the answer?

$500 answer from Multiply $500 answer from Multiply your moneyyour money

There are four quarters in each dollar. 4 x 7 = 28There are 28 quarters in $7.

Final ChanceFinal ChanceExplain how you know that 152 x 2 is greater than 300.

Final Chance answerFinal Chance answer

150 x 2 = 300

152 is 2 more than 150,

so 152 x 2 must be greater than 300.