Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 724 · 40 questions

The method (Round, then calculate): Round each number to the nearest ten, hundred or whole number. Do the easy sum with the rounded numbers. Pick the option nearest to it. To round a number, look at the digit after the place you keep: 5 or more goes up, less than 5 stays.

1. 1.Round 20729 to the nearest ten.
2. 2.Which is closest to 203 × 89? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
3. 3.Which is closest to 700 + 704 + 502? (a) 1800 (b) 2000 (c) 1900 (d) 2100
4. 4.Which is closest to 496 × 92? (Round each number first.) (a) 45000 (b) 90000 (c) 450000 (d) 4500
5. 5.Which is closest to 601 + 900 + 198? (a) 1800 (b) 1600 (c) 1900 (d) 1700
6. 6.Which is closest to 799 + 501 + 98? (a) 1400 (b) 1500 (c) 1600 (d) 1300
7. 7.Which is closest to 402 × 62? (Round each number first.) (a) 2400 (b) 48000 (c) 24000 (d) 240000
8. 8.Round 42.16 to one decimal place. =
9. 9.Which is closest to 699 + 498 + 300? (a) 1400 (b) 1700 (c) 1600 (d) 1500
10. 10.Round 82.36 to one decimal place. =
11. 11.Which is closest to 1607 ÷ 39? (a) 400 (b) 20 (c) 80 (d) 40
12. 12.Which is closest to 1194 ÷ 41? (a) 60 (b) 15 (c) 300 (d) 30
13. 13.Round 35644 to the nearest ten.
14. 14.Which is closest to 200 + 101 + 599? (a) 800 (b) 1100 (c) 900 (d) 1000
15. 15.Which is closest to 496 × 39? (Round each number first.) (a) 20000 (b) 2000 (c) 200000 (d) 40000
16. 16.Which is closest to 403 × 38? (Round each number first.) (a) 1600 (b) 160000 (c) 16000 (d) 32000
17. 17.Which is closest to 1791 ÷ 21? (a) 90 (b) 45 (c) 900 (d) 180
18. 18.Round 21636 to the nearest thousand.
19. 19.Round 63808 to the nearest hundred.
20. 20.Which is closest to 200 × 29? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
21. 21.Round 76171 to the nearest ten.
22. 22.Which is closest to 299 + 700 + 695? (a) 1700 (b) 1600 (c) 1900 (d) 1800
23. 23.Round 62997 to the nearest thousand.
24. 24.Which is closest to 802 × 61? (Round each number first.) (a) 48000 (b) 4800 (c) 480000 (d) 96000
25. 25.Which is closest to 396 + 401 + 898? (a) 1600 (b) 1800 (c) 1700 (d) 1900
26. 26.Which is closest to 403 + 197 + 96? (a) 800 (b) 600 (c) 700 (d) 900
27. 27.Which is closest to 202 × 48? (Round each number first.) (a) 20000 (b) 10000 (c) 1000 (d) 100000
28. 28.Which is closest to 301 + 804 + 197? (a) 1500 (b) 1200 (c) 1300 (d) 1400
29. 29.Which is closest to 2403 ÷ 41? (a) 30 (b) 600 (c) 60 (d) 120
30. 30.Which is closest to 201 × 89? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
31. 31.Which is closest to 296 × 79? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
32. 32.Which is closest to 1002 ÷ 19? (a) 500 (b) 25 (c) 100 (d) 50
33. 33.Which is closest to 1598 ÷ 39? (a) 40 (b) 400 (c) 80 (d) 20
34. 34.Which is closest to 500 × 78? (Round each number first.) (a) 40000 (b) 80000 (c) 4000 (d) 400000
35. 35.Which is closest to 2404 ÷ 29? (a) 40 (b) 80 (c) 800 (d) 160
36. 36.Round 22075 to the nearest thousand.
37. 37.Which is closest to 202 × 89? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
38. 38.Round 6062 to the nearest ten.
39. 39.Which is closest to 801 ÷ 19? (a) 80 (b) 40 (c) 400 (d) 20
40. 40.Round 50979 to the nearest ten.

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