A square with a side of 5 centimeters was cut from a rectangular sheet 18 centimeters long and 12 centimeters wide. What is the area of the remaining sheet?
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- Find the areas of the whole sheet and the cut-out square.
- Calculate 18 × 12 − 5 × 5.
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Answer: 191
The sheet area is 18 × 12 = 216, and the cut-out square area is 5 × 5 = 25. The remaining area is 216 − 25 = 191 square centimeters.