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Reasoning Strategies for Multiplication Facts
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Commutative property cuts memorization in HALF!
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Reminder: Communitive Property
2 + 3 = 5 = 5 Order of which addend comes first does not matter!
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Let’s begin with Doubles! Can you skip count by 2s?
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Yes. 2, 4, 6, 8, 10, …
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Congrats! Then, you know how to multiply by 2s!
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Skip count by 2s = Multiplying by 2s
Doubles Skip count by 2s = Multiplying by 2s
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Skip count by 5s = Multiplying by 5
Fives Skip count by 5s = Multiplying by 5
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Zeros Work hours example
if I work 10 dollars an hour, how much money do I make if I work ZERO hours? ZERO!!
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ONES One is a mirror When a number looks at a mirror it will see itself! 3 x 1 = 3
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Nifty Nines Hands trick
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Known Facts to Derive Other facts
4s, double the 2s
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contacts Rrfujii@hawaii.edu - Reyna kmariecarpenter@hotmail.com- Katie
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