PSLE Mary had a rectangular piece of paper, 54.4 cm by 28 cm. She cut out as many squares as possible from the paper. The side of each square was 2 cm.
- How many squares did Mary cut out?
- What area of the paper was left?
(a)
Number of squares that can be cut out lengthwise
= 54.4 ÷ 2
= 27 r 0.4
Number of squares that can be cut out breadthwise
= 28 ÷ 2
= 14 r 0
Total number of squares
= 14 x 27
= 378
(b)
Remaining length of the paper left = 0.4 cm
Area of the paper left
= 0.4 x 28
= 11.2 cm
2 Answer(s): (a) 378; (b) 11.2 cm
2