Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 794 · 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 1203 ÷ 19? (a) 60 (b) 120 (c) 600 (d) 30
2. 2.Round 59496 to the nearest ten.
3. 3.Round 85199 to the nearest hundred.
4. 4.Round 38.66 to one decimal place. =
5. 5.Which is closest to 405 + 305 + 198? (a) 800 (b) 1100 (c) 1000 (d) 900
6. 6.Round 88.11 to one decimal place. =
7. 7.Round 41069 to the nearest thousand.
8. 8.Round 19.46 to one decimal place. =
9. 9.Which is closest to 900 + 800 + 297? (a) 2000 (b) 2100 (c) 1900 (d) 2200
10. 10.Round 37.51 to one decimal place. =
11. 11.Which is closest to 806 ÷ 21? (a) 80 (b) 400 (c) 40 (d) 20
12. 12.Round 29.12 to one decimal place. =
13. 13.Which is closest to 993 ÷ 49? (a) 40 (b) 200 (c) 10 (d) 20
14. 14.Round 31.56 to one decimal place. =
15. 15.Round 61493 to the nearest ten.
16. 16.Which is closest to 399 × 70? (Round each number first.) (a) 280000 (b) 2800 (c) 28000 (d) 56000
17. 17.Which is closest to 801 × 82? (Round each number first.) (a) 6400 (b) 64000 (c) 640000 (d) 128000
18. 18.Which is closest to 1197 ÷ 29? (a) 20 (b) 400 (c) 40 (d) 80
19. 19.Which is closest to 996 ÷ 51? (a) 40 (b) 20 (c) 200 (d) 10
20. 20.Which is closest to 495 + 97 + 901? (a) 1700 (b) 1400 (c) 1600 (d) 1500
21. 21.Which is closest to 696 × 30? (Round each number first.) (a) 42000 (b) 210000 (c) 21000 (d) 2100
22. 22.Round 37213 to the nearest thousand.
23. 23.Round 5081 to the nearest ten.
24. 24.Which is closest to 705 + 299 + 400? (a) 1300 (b) 1500 (c) 1400 (d) 1600
25. 25.Round 57187 to the nearest hundred.
26. 26.Which is closest to 3202 ÷ 39? (a) 800 (b) 40 (c) 160 (d) 80
27. 27.Which is closest to 702 + 395 + 900? (a) 2200 (b) 2100 (c) 2000 (d) 1900
28. 28.Which is closest to 501 × 39? (Round each number first.) (a) 2000 (b) 40000 (c) 20000 (d) 200000
29. 29.Which is closest to 197 + 896 + 103? (a) 1200 (b) 1300 (c) 1400 (d) 1100
30. 30.Which is closest to 401 × 50? (Round each number first.) (a) 200000 (b) 40000 (c) 20000 (d) 2000
31. 31.Which is closest to 895 + 700 + 401? (a) 2100 (b) 2000 (c) 1900 (d) 2200
32. 32.Which is closest to 904 + 97 + 303? (a) 1200 (b) 1300 (c) 1400 (d) 1500
33. 33.Which is closest to 402 ÷ 19? (a) 200 (b) 20 (c) 10 (d) 40
34. 34.Which is closest to 402 × 48? (Round each number first.) (a) 40000 (b) 2000 (c) 200000 (d) 20000
35. 35.Round 20069 to the nearest ten.
36. 36.Which is closest to 296 × 39? (Round each number first.) (a) 1200 (b) 12000 (c) 24000 (d) 120000
37. 37.Which is closest to 603 + 301 + 901? (a) 1900 (b) 1700 (c) 1800 (d) 2000
38. 38.Round 87729 to the nearest ten.
39. 39.Round 69043 to the nearest thousand.
40. 40.Which is closest to 501 × 38? (Round each number first.) (a) 2000 (b) 20000 (c) 40000 (d) 200000

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