Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 473 · 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 22535 to the nearest hundred.
2. 2.Which is closest to 1609 ÷ 21? (a) 800 (b) 160 (c) 80 (d) 40
3. 3.Which is closest to 396 × 49? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
4. 4.Which is closest to 599 + 204 + 404? (a) 1200 (b) 1400 (c) 1100 (d) 1300
5. 5.Which is closest to 703 + 105 + 405? (a) 1300 (b) 1400 (c) 1100 (d) 1200
6. 6.Which is closest to 402 × 31? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
7. 7.Which is closest to 793 ÷ 19? (a) 40 (b) 400 (c) 80 (d) 20
8. 8.Which is closest to 1208 ÷ 29? (a) 40 (b) 400 (c) 20 (d) 80
9. 9.Which is closest to 592 ÷ 21? (a) 30 (b) 15 (c) 300 (d) 60
10. 10.Round 39.88 to one decimal place. =
11. 11.Round 68483 to the nearest hundred.
12. 12.Round 34.12 to one decimal place. =
13. 13.Round 91.69 to one decimal place. =
14. 14.Which is closest to 296 + 901 + 197? (a) 1500 (b) 1300 (c) 1600 (d) 1400
15. 15.Which is closest to 199 × 70? (Round each number first.) (a) 28000 (b) 14000 (c) 140000 (d) 1400
16. 16.Which is closest to 601 × 32? (Round each number first.) (a) 18000 (b) 180000 (c) 1800 (d) 36000
17. 17.Which is closest to 703 + 395 + 103? (a) 1200 (b) 1100 (c) 1400 (d) 1300
18. 18.Which is closest to 95 + 599 + 95? (a) 800 (b) 1000 (c) 700 (d) 900
19. 19.Which is closest to 799 + 97 + 503? (a) 1600 (b) 1500 (c) 1400 (d) 1300
20. 20.Which is closest to 302 × 58? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
21. 21.Which is closest to 698 + 498 + 102? (a) 1500 (b) 1400 (c) 1200 (d) 1300
22. 22.Which is closest to 599 × 72? (Round each number first.) (a) 420000 (b) 42000 (c) 4200 (d) 84000
23. 23.Which is closest to 197 + 295 + 704? (a) 1300 (b) 1200 (c) 1100 (d) 1400
24. 24.Which is closest to 2998 ÷ 49? (a) 120 (b) 60 (c) 30 (d) 600
25. 25.Which is closest to 399 × 32? (Round each number first.) (a) 120000 (b) 24000 (c) 12000 (d) 1200
26. 26.Round 50.62 to one decimal place. =
27. 27.Round 33012 to the nearest ten.
28. 28.Which is closest to 500 + 895 + 595? (a) 1900 (b) 2000 (c) 2200 (d) 2100
29. 29.Which is closest to 600 × 61? (Round each number first.) (a) 3600 (b) 36000 (c) 360000 (d) 72000
30. 30.Round 3149 to the nearest thousand.
31. 31.Which is closest to 396 × 59? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
32. 32.Round 54.62 to one decimal place. =
33. 33.Round 57753 to the nearest ten.
34. 34.Which is closest to 397 × 41? (Round each number first.) (a) 32000 (b) 1600 (c) 160000 (d) 16000
35. 35.Round 26.86 to one decimal place. =
36. 36.Which is closest to 296 × 31? (Round each number first.) (a) 18000 (b) 900 (c) 9000 (d) 90000
37. 37.Which is closest to 700 + 498 + 105? (a) 1400 (b) 1300 (c) 1200 (d) 1500
38. 38.Which is closest to 398 × 38? (Round each number first.) (a) 32000 (b) 160000 (c) 1600 (d) 16000
39. 39.Which is closest to 498 × 50? (Round each number first.) (a) 50000 (b) 250000 (c) 2500 (d) 25000
40. 40.Round 37884 to the nearest ten.

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