Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 89 · 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 82906 to the nearest ten.
2. 2.Which is closest to 597 + 195 + 95? (a) 1100 (b) 900 (c) 1000 (d) 800
3. 3.Which is closest to 897 × 92? (Round each number first.) (a) 8100 (b) 810000 (c) 162000 (d) 81000
4. 4.Which is closest to 495 + 298 + 802? (a) 1600 (b) 1700 (c) 1800 (d) 1500
5. 5.Which is closest to 2796 ÷ 41? (a) 35 (b) 140 (c) 70 (d) 700
6. 6.Which is closest to 2005 ÷ 41? (a) 500 (b) 25 (c) 50 (d) 100
7. 7.Which is closest to 704 × 89? (Round each number first.) (a) 126000 (b) 630000 (c) 63000 (d) 6300
8. 8.Which is closest to 604 × 91? (Round each number first.) (a) 5400 (b) 108000 (c) 540000 (d) 54000
9. 9.Round 62328 to the nearest hundred.
10. 10.Which is closest to 603 × 28? (Round each number first.) (a) 36000 (b) 18000 (c) 1800 (d) 180000
11. 11.Which is closest to 304 × 59? (Round each number first.) (a) 18000 (b) 180000 (c) 1800 (d) 36000
12. 12.Round 48228 to the nearest thousand.
13. 13.Which is closest to 200 × 78? (Round each number first.) (a) 160000 (b) 16000 (c) 1600 (d) 32000
14. 14.Round 55741 to the nearest hundred.
15. 15.Round 35228 to the nearest thousand.
16. 16.Which is closest to 3993 ÷ 49? (a) 800 (b) 160 (c) 40 (d) 80
17. 17.Round 59.08 to one decimal place. =
18. 18.Round 97.93 to one decimal place. =
19. 19.Which is closest to 991 ÷ 19? (a) 25 (b) 100 (c) 50 (d) 500
20. 20.Which is closest to 502 + 896 + 802? (a) 2100 (b) 2200 (c) 2300 (d) 2400
21. 21.Round 87844 to the nearest ten.
22. 22.Which is closest to 298 × 41? (Round each number first.) (a) 12000 (b) 24000 (c) 120000 (d) 1200
23. 23.Which is closest to 202 × 61? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
24. 24.Which is closest to 605 + 397 + 603? (a) 1800 (b) 1600 (c) 1500 (d) 1700
25. 25.Which is closest to 795 + 395 + 203? (a) 1400 (b) 1500 (c) 1600 (d) 1300
26. 26.Which is closest to 4006 ÷ 49? (a) 160 (b) 40 (c) 800 (d) 80
27. 27.Round 75.51 to one decimal place. =
28. 28.Which is closest to 197 × 88? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
29. 29.Round 87.48 to one decimal place. =
30. 30.Which is closest to 299 × 48? (Round each number first.) (a) 30000 (b) 150000 (c) 15000 (d) 1500
31. 31.Round 16.47 to one decimal place. =
32. 32.Round 40.92 to one decimal place. =
33. 33.Which is closest to 703 × 22? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
34. 34.Which is closest to 296 × 68? (Round each number first.) (a) 210000 (b) 2100 (c) 21000 (d) 42000
35. 35.Which is closest to 299 + 401 + 201? (a) 1100 (b) 800 (c) 1000 (d) 900
36. 36.Round 8984 to the nearest hundred.
37. 37.Round 53244 to the nearest ten.
38. 38.Round 63.22 to one decimal place. =
39. 39.Round 24041 to the nearest thousand.
40. 40.Which is closest to 104 + 395 + 198? (a) 900 (b) 800 (c) 600 (d) 700

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