Primary 4 Mathematics · Chapter 6 · Answers and explanations
Lesson 6.4: Fraction of a Set (answers)
Section A · Multiple choice 4 marks
1. What fraction of the counters is shaded?1 mark
(A) 912(B) 14(C) 312(D) 34
Answer: (D) 34There are 12 counters and 9 are shaded: 912. Divide the top and bottom by 3: 912 = 34.
2. Find 15 of 35.1 mark
(A) 7(B) 5(C) 30(D) 175
Answer: (A) 7Share 35 into 5 equal groups: 35 ÷ 5 = 7. So 15 of 35 is 7.
3. Find 34 of 48.1 mark
(A) 12(B) 36(C) 45(D) 16
Answer: (B) 361 quarter of 48 = 48 ÷ 4 = 12. 3 quarters = 3 × 12 = 36.
4. There are 40 sweets in a bag. 38 of them are red. How many red sweets are there?1 mark
(A) 5(B) 25(C) 15(D) 24
Answer: (C) 151 eighth of 40 = 40 ÷ 8 = 5. 3 eighths = 3 × 5 = 15 red sweets.
Section B · Write your answer 11 marks
5. Find 16 of 54.1 mark
Answer: 954 ÷ 6 = 9.
6. Find 58 of 24 counters.1 mark
Answer: 1524 ÷ 8 = 3 in each group. 5 × 3 = 15.
7. Find 710 of 60.1 mark
Answer: 4260 ÷ 10 = 6. 7 × 6 = 42.
8. What fraction of the counters is shaded? Give your answer in the simplest form.1 mark
Answer: 25There are 20 counters and 8 are shaded: 820. Divide the top and bottom by 4: 820 = 25.
9. Out of 40 pupils in a class, 15 walk to school. What fraction of the pupils walk to school?1 mark
Answer: 381540: divide the top and bottom by 5 to get 38.
10. How many more is 56 of 48 than 34 of 48?2 marks
Answer: 456 of 48: 48 ÷ 6 = 8, 5 × 8 = 40.
34 of 48: 48 ÷ 4 = 12, 3 × 12 = 36.
40 − 36 = 4.
11. A box has 60 beads. 25 of the beads are red and 13 of the beads are blue. The rest are green. How many green beads are there?2 marks
Answer: 16Red: 60 ÷ 5 = 12, 2 × 12 = 24.
Blue: 60 ÷ 3 = 20.
Green: 60 − 24 − 20 = 16.
12. In a club of 40 pupils, 35 are girls. How many more girls than boys are there in the club?2 marks
Answer: 8Girls: 40 ÷ 5 = 8, 3 × 8 = 24.
Boys: 40 − 24 = 16.
24 − 16 = 8 more girls.
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