PSLE Usha had a rectangular piece of paper, 42.9 cm by 22 cm. She cut out as many squares as possible from the paper. The side of each square was 2 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
= 42.9 ÷ 2
= 21 r 0.9
Number of squares that can be cut out breadthwise
= 22 ÷ 2
= 11 r 0
Total number of squares
= 11 x 21
= 231
(b)
Remaining length of the paper left = 0.9 cm
Area of the paper left
= 0.9 x 22
= 19.8 cm
2 Answer(s): (a) 231; (b) 19.8 cm
2