PSLE Rachel had a rectangular piece of paper, 40.7 cm by 21 cm. She cut out as many squares as possible from the paper. The side of each square was 3 cm.
- How many squares did Rachel cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 40.7 ÷ 3
= 13 r 1.7
Number of squares that can be cut out breadthwise
= 21 ÷ 3
= 7 r 0
Total number of squares
= 7 x 13
= 91
(b)
Remaining length of the paper left = 1.7 cm
Area of the paper left
= 1.7 x 21
= 35.7 cm
2 Answer(s): (a) 91; (b) 35.7 cm
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