PSLE Risa had a rectangular piece of paper, 55 cm by 35.8 cm. She cut out as many squares as possible from the paper. The side of each square was 5 cm.
- How many squares did Risa cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out breadthwise
= 35.8 ÷ 5
= 7 r 0.8
Number of squares that can be cut out lengthwise
= 55 ÷ 5
= 11 r 0
Total number of squares
= 11 x 7
= 77
(b)
Remaining breadth of the paper left = 0.8 cm
Area of the paper left
= 55 x 0.8
= 44 cm
2 Answer(s): (a) 77; (b) 44 cm
2