Question: CA-90 Chapter 4 . Multiplication SECTION 4.3 CLASS ACTIVITY 4-H Why Is the Associative Property of Multiplication True? CCSS CCSS SMP7, 3.0A.5 Gum Problem: You

CA-90 Chapter 4 . Multiplication SECTION 4.3 CLASS ACTIVITY 4-H Why Is the Associative Property of Multiplication True? CCSS CCSS SMP7, 3.0A.5 Gum Problem: You have 4 bags of gum. Each bag has 8 packs. Each pack has 5 sticks of gum. How many sticks of gum do you have? 1. Find two different ways to solve the Gum Problem by multiplying. Explain your reasoning in each case. Is one way easier than the other? 2. Explain how to interpret 4 . (8 . 5) and (4 . 8) . 5 in terms of the Gum Problem. Use our definition of multiplication in each case. 3. Based on the situation of the Gum Problem, how do we know that the following equation must necessarily be true even if we didn't know how many sticks of gum there are? . 4 . (8 . 5 ) = (4.8) . 5

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