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
Veronica is making a poster for science class.
[IMG]
What is the total area, in square feet, of the poster?
Problem 2
Setsuko is redoing a room and wants to put wallpaper on a wall that has a window. The wall with the window, shaded, are shown in the diagram below.
[IMG]
How many square feet of wallpaper will Setsuko use on the wall?


aligns: no