Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 758 · 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 399 + 798 + 899? (a) 2100 (b) 2200 (c) 2000 (d) 2300
2. 2.Which is closest to 1197 ÷ 19? (a) 30 (b) 60 (c) 120 (d) 600
3. 3.Round 58267 to the nearest thousand.
4. 4.Round 82952 to the nearest hundred.
5. 5.Round 87.82 to one decimal place. =
6. 6.Which is closest to 404 × 48? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
7. 7.Which is closest to 497 + 700 + 695? (a) 2000 (b) 2100 (c) 1800 (d) 1900
8. 8.Round 25.84 to one decimal place. =
9. 9.Which is closest to 3196 ÷ 41? (a) 160 (b) 40 (c) 800 (d) 80
10. 10.Which is closest to 896 ÷ 29? (a) 15 (b) 300 (c) 60 (d) 30
11. 11.Which is closest to 502 × 41? (Round each number first.) (a) 200000 (b) 40000 (c) 20000 (d) 2000
12. 12.Round 17.53 to one decimal place. =
13. 13.Which is closest to 397 × 70? (Round each number first.) (a) 28000 (b) 2800 (c) 280000 (d) 56000
14. 14.Which is closest to 398 × 20? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
15. 15.Which is closest to 803 + 605 + 396? (a) 1700 (b) 1900 (c) 1800 (d) 2000
16. 16.Round 60.11 to one decimal place. =
17. 17.Round 18.88 to one decimal place. =
18. 18.Which is closest to 796 × 71? (Round each number first.) (a) 5600 (b) 560000 (c) 56000 (d) 112000
19. 19.Round 49177 to the nearest thousand.
20. 20.Which is closest to 300 × 29? (Round each number first.) (a) 900 (b) 9000 (c) 90000 (d) 18000
21. 21.Which is closest to 3000 ÷ 51? (a) 600 (b) 60 (c) 30 (d) 120
22. 22.Which is closest to 404 + 103 + 201? (a) 600 (b) 800 (c) 900 (d) 700
23. 23.Which is closest to 1206 ÷ 39? (a) 60 (b) 15 (c) 30 (d) 300
24. 24.Which is closest to 399 × 90? (Round each number first.) (a) 3600 (b) 72000 (c) 36000 (d) 360000
25. 25.Which is closest to 504 + 895 + 901? (a) 2400 (b) 2300 (c) 2200 (d) 2500
26. 26.Which is closest to 402 × 19? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
27. 27.Which is closest to 799 × 80? (Round each number first.) (a) 128000 (b) 640000 (c) 6400 (d) 64000
28. 28.Round 25.49 to one decimal place. =
29. 29.Which is closest to 703 × 81? (Round each number first.) (a) 56000 (b) 560000 (c) 5600 (d) 112000
30. 30.Which is closest to 297 × 20? (Round each number first.) (a) 12000 (b) 6000 (c) 600 (d) 60000
31. 31.Which is closest to 300 × 39? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
32. 32.Which is closest to 2798 ÷ 41? (a) 700 (b) 70 (c) 140 (d) 35
33. 33.Round 23994 to the nearest hundred.
34. 34.Which is closest to 1499 ÷ 31? (a) 25 (b) 100 (c) 50 (d) 500
35. 35.Which is closest to 198 × 30? (Round each number first.) (a) 6000 (b) 60000 (c) 600 (d) 12000
36. 36.Which is closest to 302 × 72? (Round each number first.) (a) 21000 (b) 210000 (c) 42000 (d) 2100
37. 37.Which is closest to 3992 ÷ 49? (a) 800 (b) 160 (c) 40 (d) 80
38. 38.Which is closest to 896 + 395 + 101? (a) 1400 (b) 1500 (c) 1300 (d) 1600
39. 39.Which is closest to 2402 ÷ 39? (a) 600 (b) 120 (c) 60 (d) 30
40. 40.Which is closest to 896 + 299 + 200? (a) 1400 (b) 1600 (c) 1300 (d) 1500

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