Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 82 · 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 33267 to the nearest thousand.
2. 2.Which is closest to 794 ÷ 19? (a) 20 (b) 80 (c) 40 (d) 400
3. 3.Which is closest to 903 × 19? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
4. 4.Which is closest to 2698 ÷ 31? (a) 900 (b) 180 (c) 45 (d) 90
5. 5.Which is closest to 802 × 48? (Round each number first.) (a) 4000 (b) 80000 (c) 40000 (d) 400000
6. 6.Round 81801 to the nearest hundred.
7. 7.Which is closest to 3201 ÷ 39? (a) 800 (b) 40 (c) 160 (d) 80
8. 8.Which is closest to 703 × 40? (Round each number first.) (a) 2800 (b) 56000 (c) 280000 (d) 28000
9. 9.Which is closest to 597 + 302 + 604? (a) 1400 (b) 1500 (c) 1700 (d) 1600
10. 10.Round 73.88 to one decimal place. =
11. 11.Round 96979 to the nearest thousand.
12. 12.Round 53806 to the nearest hundred.
13. 13.Which is closest to 296 × 51? (Round each number first.) (a) 150000 (b) 30000 (c) 1500 (d) 15000
14. 14.Which is closest to 204 × 32? (Round each number first.) (a) 6000 (b) 60000 (c) 12000 (d) 600
15. 15.Which is closest to 501 × 38? (Round each number first.) (a) 2000 (b) 40000 (c) 20000 (d) 200000
16. 16.Which is closest to 796 × 81? (Round each number first.) (a) 128000 (b) 6400 (c) 64000 (d) 640000
17. 17.Round 82.09 to one decimal place. =
18. 18.Round 74864 to the nearest hundred.
19. 19.Which is closest to 403 + 301 + 598? (a) 1400 (b) 1200 (c) 1500 (d) 1300
20. 20.Which is closest to 2402 ÷ 39? (a) 30 (b) 600 (c) 60 (d) 120
21. 21.Which is closest to 297 × 32? (Round each number first.) (a) 90000 (b) 18000 (c) 900 (d) 9000
22. 22.Which is closest to 3509 ÷ 49? (a) 35 (b) 700 (c) 140 (d) 70
23. 23.Round 46442 to the nearest ten.
24. 24.Which is closest to 901 × 38? (Round each number first.) (a) 72000 (b) 36000 (c) 360000 (d) 3600
25. 25.Round 94960 to the nearest thousand.
26. 26.Which is closest to 97 + 895 + 295? (a) 1300 (b) 1500 (c) 1200 (d) 1400
27. 27.Which is closest to 3000 ÷ 49? (a) 120 (b) 600 (c) 30 (d) 60
28. 28.Round 63.61 to one decimal place. =
29. 29.Which is closest to 803 × 31? (Round each number first.) (a) 24000 (b) 48000 (c) 2400 (d) 240000
30. 30.Which is closest to 201 × 20? (Round each number first.) (a) 40000 (b) 4000 (c) 8000 (d) 400
31. 31.Which is closest to 196 × 69? (Round each number first.) (a) 14000 (b) 28000 (c) 1400 (d) 140000
32. 32.Which is closest to 296 × 32? (Round each number first.) (a) 900 (b) 90000 (c) 18000 (d) 9000
33. 33.Which is closest to 602 + 195 + 103? (a) 1100 (b) 900 (c) 800 (d) 1000
34. 34.Which is closest to 800 × 78? (Round each number first.) (a) 128000 (b) 6400 (c) 64000 (d) 640000
35. 35.Which is closest to 896 × 52? (Round each number first.) (a) 90000 (b) 450000 (c) 4500 (d) 45000
36. 36.Which is closest to 903 × 21? (Round each number first.) (a) 18000 (b) 1800 (c) 36000 (d) 180000
37. 37.Which is closest to 503 × 91? (Round each number first.) (a) 90000 (b) 4500 (c) 450000 (d) 45000
38. 38.Which is closest to 1395 ÷ 21? (a) 35 (b) 140 (c) 700 (d) 70
39. 39.Round 12664 to the nearest hundred.
40. 40.Which is closest to 504 × 89? (Round each number first.) (a) 450000 (b) 45000 (c) 90000 (d) 4500

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