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: Solve.
a.   7 × 10 = _______
b.   100 × 7 = _______
c.   _______ = 7 × 1,000
d.   10 × 3 = _______
e.   1,000 × 30 = _______
f.   _______ = 10 × 30
g.   100 × 14 = _______
h.   _______ = 10 × 25
i.   54 × 1,000 = _______


aligns: no