PSLE Risa had a rectangular piece of paper, 51.8 cm by 36 cm. She cut out as many squares as possible from the paper. The side of each square was 4 cm.
- How many squares did Risa cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 51.8 ÷ 4
= 12 r 3.8
Number of squares that can be cut out breadthwise
= 36 ÷ 4
= 9 r 0
Total number of squares
= 9 x 12
= 108
(b)
Remaining length of the paper left = 3.8 cm
Area of the paper left
= 3.8 x 36
= 136.8 cm
2 Answer(s): (a) 108; (b) 136.8 cm
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