A piece of rectangular paper is 36 cm long and 20 cm wide. Fold the paper into the largest square. What is the square area?

A piece of rectangular paper is 36 cm long and 20 cm wide. Fold the paper into the largest square. What is the square area?


Use width as the side length of a square, and its area will be larger
The area of a square is 20 * 20 = 400 square centimeters



Lingling cut the largest square from a piece of rectangular paper 36 cm long and 20 cm wide. What's the area of the remaining paper?


（36-20）×20
=16×20
=320 (square centimeter)

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