The area of a rectangle is the number of unit squares that cover it. A third grader learns that the squares sit in equal rows, so counting them is the same as multiplying the number of rows by the number in each row. On this worksheet your child sees nine rectangles drawn on a grid, each with its two sides labelled in meters, and writes the area as a number of square meters.
Building Confidence uses small rectangles up to 5 by 5, On Level uses sides up to 8, and Challenge Me uses sides up to 9, including squares. Ask your child to say the multiplication sentence out loud before writing the answer: 3 rows of 5 squares is 3 times 5, which is 15 square meters.
What your child will learn
Find area by multiplying the two side lengths
Write area in square units
Connect rows of squares to multiplication
Common Core standard: 3.MD.C.7
Worked example
A rectangle 5 meters long and 3 meters wide has 3 rows of 5 squares: 3 × 5 = 15 square meters.
Common mistake
Adding the sides, which finds the distance around, instead of multiplying them.