PSLE Usha had a rectangular piece of paper, 79.5 cm by 40 cm. She cut out as many squares as possible from the paper. The side of each square was 5 cm.
- How many squares did Usha cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 79.5 ÷ 5
= 15 r 4.5
Number of squares that can be cut out breadthwise
= 40 ÷ 5
= 8 r 0
Total number of squares
= 8 x 15
= 120
(b)
Remaining length of the paper left = 4.5 cm
Area of the paper left
= 4.5 x 40
= 180 cm
2 Answer(s): (a) 120; (b) 180 cm
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