PSLE Mary had a rectangular piece of paper, 62.8 cm by 39 cm. She cut out as many squares as possible from the paper. The side of each square was 3 cm.
- How many squares did Mary cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 62.8 ÷ 3
= 20 r 2.8
Number of squares that can be cut out breadthwise
= 39 ÷ 3
= 13 r 0
Total number of squares
= 13 x 20
= 260
(b)
Remaining length of the paper left = 2.8 cm
Area of the paper left
= 2.8 x 39
= 109.2 cm
2 Answer(s): (a) 260; (b) 109.2 cm
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