standard_description: Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = �� ÷ 3, 6 × 6 = ?.
problem_activity: Problem 1
The shape below has a perimeter of 30 feet.
[IMG]
What is the length of the side that is missing a number?
Problem 2
Tessa ropes off a rectangular part of her lawn to create a play area for her dog. She uses 32 yards of rope. What is the missing side length of the play area?
[IMG]


aligns: no