Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 192 · 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.Which is closest to 396 × 38? (Round each number first.) (a) 1600 (b) 160000 (c) 16000 (d) 32000
2. 2.Which is closest to 101 + 304 + 204? (a) 700 (b) 500 (c) 600 (d) 800
3. 3.Round 86393 to the nearest thousand.
4. 4.Which is closest to 202 × 41? (Round each number first.) (a) 16000 (b) 8000 (c) 800 (d) 80000
5. 5.Which is closest to 99 + 705 + 502? (a) 1500 (b) 1200 (c) 1300 (d) 1400
6. 6.Which is closest to 897 × 91? (Round each number first.) (a) 810000 (b) 8100 (c) 162000 (d) 81000
7. 7.Round 48499 to the nearest hundred.
8. 8.Which is closest to 698 × 50? (Round each number first.) (a) 35000 (b) 3500 (c) 70000 (d) 350000
9. 9.Which is closest to 802 + 102 + 396? (a) 1200 (b) 1400 (c) 1500 (d) 1300
10. 10.Round 32.74 to one decimal place. =
11. 11.Round 19700 to the nearest thousand.
12. 12.Round 17161 to the nearest thousand.
13. 13.Which is closest to 3503 ÷ 51? (a) 700 (b) 140 (c) 35 (d) 70
14. 14.Which is closest to 404 + 404 + 97? (a) 1000 (b) 1100 (c) 800 (d) 900
15. 15.Which is closest to 1393 ÷ 19? (a) 35 (b) 700 (c) 140 (d) 70
16. 16.Which is closest to 200 × 19? (Round each number first.) (a) 400 (b) 4000 (c) 8000 (d) 40000
17. 17.Round 76015 to the nearest thousand.
18. 18.Which is closest to 100 + 501 + 795? (a) 1500 (b) 1600 (c) 1400 (d) 1300
19. 19.Round 8588 to the nearest hundred.
20. 20.Which is closest to 3495 ÷ 49? (a) 140 (b) 700 (c) 70 (d) 35
21. 21.Round 53.63 to one decimal place. =
22. 22.Round 8932 to the nearest hundred.
23. 23.Which is closest to 900 × 42? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
24. 24.Which is closest to 496 × 90? (Round each number first.) (a) 45000 (b) 450000 (c) 90000 (d) 4500
25. 25.Which is closest to 1005 ÷ 51? (a) 20 (b) 40 (c) 10 (d) 200
26. 26.Which is closest to 302 × 32? (Round each number first.) (a) 18000 (b) 900 (c) 90000 (d) 9000
27. 27.Which is closest to 898 + 202 + 897? (a) 1900 (b) 2000 (c) 2100 (d) 2200
28. 28.Which is closest to 499 + 596 + 296? (a) 1400 (b) 1300 (c) 1500 (d) 1600
29. 29.Which is closest to 699 + 498 + 901? (a) 2300 (b) 2000 (c) 2100 (d) 2200
30. 30.Round 70718 to the nearest ten.
31. 31.Which is closest to 596 × 88? (Round each number first.) (a) 5400 (b) 54000 (c) 540000 (d) 108000
32. 32.Which is closest to 901 + 395 + 395? (a) 1800 (b) 1700 (c) 1900 (d) 1600
33. 33.Which is closest to 202 × 21? (Round each number first.) (a) 400 (b) 40000 (c) 8000 (d) 4000
34. 34.Which is closest to 299 × 48? (Round each number first.) (a) 1500 (b) 150000 (c) 30000 (d) 15000
35. 35.Which is closest to 300 + 405 + 602? (a) 1400 (b) 1500 (c) 1200 (d) 1300
36. 36.Which is closest to 298 × 41? (Round each number first.) (a) 24000 (b) 120000 (c) 1200 (d) 12000
37. 37.Which is closest to 604 × 41? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
38. 38.Which is closest to 900 × 89? (Round each number first.) (a) 81000 (b) 162000 (c) 8100 (d) 810000
39. 39.Round 12252 to the nearest hundred.
40. 40.Which is closest to 2799 ÷ 39? (a) 35 (b) 140 (c) 700 (d) 70

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