MGSE3.OA.5

Apply properties of operations as strategies to multiply and divide.13 Examples: If 6 4 = 24 is known, then 4 6 = 24 is also known(Commutative property of multiplication.) 3 5 2 can be found by 3 5 = 15, then 15 2 = 30, or by 5 2 = 10, then 3 10 = 30(Associative property of multiplication.) Knowing that 8 5 = 40 and 8 2 = 16, one can find 8 7 as 8 (5 + 2) = (8 5) + (8 2) = 40 + 16 = 56(Distributive property.)