Primary 4 Mathematics · Chapter 9 · Answers and explanations
Lesson 9.6: Fractions and Decimals (answers)
Section A · Multiple choice 4 marks
1. Express 310 as a decimal.1 mark
(A) 0.03(B) 0.3(C) 3.0(D) 30
Answer: (B) 0.33 tenths = 0.3.
2. Express 34 as a decimal.1 mark
(A) 0.34(B) 0.75(C) 0.7(D) 0.43
Answer: (B) 0.753/4 = 75/100 = 0.75.
3. Express 0.6 as a fraction in its simplest form.1 mark
(A) 610(B) 35(C) 23(D) 16
Answer: (B) 350.6 = 6/10. Divide the top and bottom by 2 to get 3/5.
4. Express 1.25 as a mixed number in its simplest form.1 mark
(A) 1 25100(B) 1 14(C) 1 15(D) 1 52
Answer: (B) 1 141.25 = 1 + 25/100 = 1 + 1/4.
Section B · Write your answer 11 marks
5. Express 7100 as a decimal.1 mark
Answer: 0.077 hundredths = 0.07.
6. Express 12 as a decimal.1 mark
Answer: 0.51/2 = 5/10 = 0.5.
7. Express 920 as a decimal.1 mark
Answer: 0.45Multiply the top and bottom by 5: 9/20 = 45/100 = 0.45.
8. Express 2 15 as a decimal.1 mark
Answer: 2.21/5 = 2/10, so 2 + 0.2 = 2.2.
9. Express 0.35 as a fraction in its simplest form.2 marks
Answer: 7200.35 = 35/100. Divide the top and bottom by 5 to get 7/20.
10. Express 0.09 as a fraction.1 mark
Answer: 91009 hundredths = 9/100.
11. Express 4.8 as a mixed number in its simplest form.2 marks
Answer: 4 454.8 = 4 + 8/10 = 4 + 4/5.
12. Raj ate 0.75 of a pizza. What fraction of the pizza is that, in its simplest form?2 marks
Answer: 340.75 = 75/100. Divide the top and bottom by 25 to get 3/4.
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