PSLE Jade had a rectangular piece of paper, 72.9 cm by 40 cm. She cut out as many squares as possible from the paper. The side of each square was 4 cm.
- How many squares did Jade cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 72.9 ÷ 4
= 18 r 0.90000000000001
Number of squares that can be cut out breadthwise
= 40 ÷ 4
= 10 r 0
Total number of squares
= 10 x 18
= 180
(b)
Remaining length of the paper left = 0.90000000000001 cm
Area of the paper left
= 0.90000000000001 x 40
= 36 cm
2 Answer(s): (a) 180; (b) 36 cm
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