Primary 4 Mathematics · Chapter 9 · Answers and explanations
Lesson 9.4: Comparing, Ordering and Patterns (answers)
Section A · Multiple choice 4 marks
1. Which is the greatest?1 mark
(A) 1.8(B) 1.08(C) 1.008(D) 1.080
Answer: (A) 1.8All the ones are 1. Tenths: 8, 0, 0, 0. So 1.8 is the greatest.
2. Which list is in order from the smallest to the greatest?1 mark
(A) 4.35, 4.053, 4.5(B) 4.053, 4.35, 4.5(C) 4.5, 4.35, 4.053(D) 4.053, 4.5, 4.35
Answer: (B) 4.053, 4.35, 4.5Tenths: 0, 3, 5. So 4.053 < 4.35 < 4.5.
3. Which symbol makes this true? 2.709 ___ 2.791 mark
(A) >(B) <(C) =
Answer: (B) <Ones and tenths are the same (2.7). Hundredths: 0 and 9. So 2.709 < 2.79.
4. What is the next number? 5.9, 5.7, 5.5, ____1 mark
(A) 5.6(B) 5.4(C) 5.3(D) 5.2
Answer: (C) 5.3The rule is subtract 0.2: 5.5 − 0.2 = 5.3.
Section B · Write your answer 11 marks
5. Write >, < or = in the box: 3.4 ___ 3.401 mark
Answer: =3.4 = 3.40.
6. Write > or <: 0.9 ___ 0.891 mark
Answer: >Tenths: 9 is more than 8, so 0.9 > 0.89.
7. Arrange from the smallest to the greatest: 2.709, 2.97, 2.79.2 marks
Answer: 2.709, 2.79, 2.97Tenths: 7, 9, 7. So 2.97 is the greatest. For the other two, hundredths: 0 and 9.
8. Arrange from the greatest to the smallest: 0.3, 0.33, 0.303.2 marks
Answer: 0.33, 0.303, 0.3Tenths are all 3. Hundredths: 0, 3, 0. 0.33 is greatest; then compare 0.303 and 0.3 (0.300).
9. Find the missing number: 1.2, 1.3, 1.4, ____, 1.6.1 mark
Answer: 1.5The rule is add 0.1.
10. Find the missing number: 3.40, 3.45, 3.50, ____, 3.60.1 mark
Answer: 3.55The rule is add 0.05.
11. What is the rule? 8.0, 7.5, 7.0, 6.5.1 mark
Answer: Subtract 0.5Each number is 0.5 less than the one before.
12. Tara says 0.45 is greater than 0.5 because 45 is greater than 5. Is she right? Explain.2 marks
Answer: No. 0.5 is greater0.5 = 0.50 and 0.50 > 0.45. Compare place by place, not by the number of digits.
Shukr Learns · free practice for parents and children · original questions, not affiliated with any school or agency