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Reasoning Strategies for Multiplication Facts

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Presentation on theme: "Reasoning Strategies for Multiplication Facts"— Presentation transcript:

1 Reasoning Strategies for Multiplication Facts

2 Commutative property cuts memorization in HALF!

3 Reminder: Communitive Property
2 + 3 = 5  = 5 Order of which addend comes first does not matter!

4 Let’s begin with Doubles! Can you skip count by 2s?

5 Yes. 2, 4, 6, 8, 10, …

6 Congrats! Then, you know how to multiply by 2s!

7 Skip count by 2s = Multiplying by 2s
Doubles Skip count by 2s = Multiplying by 2s

8 Skip count by 5s = Multiplying by 5
Fives Skip count by 5s = Multiplying by 5

9 Zeros Work hours example
if I work 10 dollars an hour, how much money do I make if I work ZERO hours? ZERO!!

10 ONES One is a mirror When a number looks at a mirror it will see itself! 3 x 1 = 3

11 Nifty Nines Hands trick

12 Known Facts to Derive Other facts
4s, double the 2s

13 contacts Rrfujii@hawaii.edu - Reyna kmariecarpenter@hotmail.com- Katie
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