standard_description: 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 = 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.)
problem_activity: Problem 1
Ms. Macklin puts thirty-two pencils into 4 pencil jars. She puts an equal number into each jar.
a.   How many pencils are in each pencil jar?
b.   How many pencils are in 3 pencil jars?
Problem 2
Mr. Bader has 5 pans of brownies, each of which he cuts into 6 pieces. He then puts an equal number of brownie slices onto 3 plates. How many brownie pieces are on each plate?


aligns: no