PSLE Nora had a rectangular piece of paper, 43.1 cm by 20 cm. She cut out as many squares as possible from the paper. The side of each square was 5 cm.
- How many squares did Nora cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 43.1 ÷ 5
= 8 r 3.1
Number of squares that can be cut out breadthwise
= 20 ÷ 5
= 4 r 0
Total number of squares
= 4 x 8
= 32
(b)
Remaining length of the paper left = 3.1 cm
Area of the paper left
= 3.1 x 20
= 62 cm
2 Answer(s): (a) 32; (b) 62 cm
2