Primary 4 Mathematics · Chapter 1 · Answers and explanations
Lesson 1.7: Rounding to the Nearest 1000
Use this page to check the practice sheet together. Talk about why each answer is right. Total: 16 marks.
Section A · Multiple choice 4 marks
1. Round 7480 to the nearest 1000.1 mark
(A) 7000(B) 7500(C) 8000(D) 7400
Answer: (A) 7000The hundreds digit is 4, which is less than 5, so round down to 7000.
2. Round 36 500 to the nearest 1000.1 mark
(A) 36 000(B) 36 500(C) 37 000(D) 40 000
Answer: (C) 37 000The hundreds digit is 5, so round up to 37 000.
3. Round 89 620 to the nearest 1000.1 mark
(A) 89 000(B) 89 600(C) 89 700(D) 90 000
Answer: (D) 90 000The hundreds digit is 6, so round up. 89 000 becomes 90 000.
4. Which number rounds to 25 000 to the nearest 1000?1 mark
(A) 24 400(B) 24 600(C) 25 600(D) 26 400
Answer: (B) 24 60024 600 has hundreds digit 6, so it rounds up to 25 000. The others round to 24 000, 26 000 and 26 000.
Section B · Write your answer 12 marks
5. Round 52 310 to the nearest 1000.1 mark
Answer: 52 000The hundreds digit is 3, so round down to 52 000.
6. Round 9500 to the nearest 1000.1 mark
Answer: 10 000The hundreds digit is 5, so round up to 10 000.
7. Round 99 501 to the nearest 1000.1 mark
Answer: 100 000The hundreds digit is 5, so round up to 100 000.
8. Round 46 285 to the nearest 10, the nearest 100 and the nearest 1000.3 marks
Answer: nearest 10: 46 290; nearest 100: 46 300; nearest 1000: 46 000Nearest 10: ones digit 5, round up. Nearest 100: tens digit 8, round up. Nearest 1000: hundreds digit 2, round down.
9. Which digit decides when you round to the nearest 1000?1 mark
Answer: the hundreds digitLook at the digit just to the right of the thousands place. That is the hundreds digit.
10. A fair had 18 760 visitors. About how many, to the nearest 1000?1 mark
Answer: 19 000The hundreds digit is 7, so round up to 19 000.
11. Write the smallest and the greatest whole numbers that round to 40 000 to the nearest 1000.2 marks
Answer: smallest 39 500; greatest 40 49939 500 has hundreds digit 5, so it rounds up to 40 000. 40 499 has hundreds digit 4, so it rounds down to 40 000.
12. Ben says 4499 rounds to 5000 to the nearest 1000 because 499 is nearly 500. Is he correct? Explain.2 marks
Answer: No. The hundreds digit is 4, so it rounds down to 4000.Only the hundreds digit matters. It is 4, which is less than 5, so 4499 ≈ 4000.
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