CCSS.Math.Content.3.OA.B.5 - Objective

Apply properties of operations as strategies to multiply and divide. (Students need not use formal terms for these properties.) 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 × 2) = 3 × 10 = 30 (Associative property of multiplication) or by (3 × 5) × 2 = 15 × 2 = 30. 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.)

3rd Grade · Common Core State Standards · Common Core 2010