Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 574 · 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 72658 to the nearest hundred.
2. 2.Which is closest to 197 × 62? (Round each number first.) (a) 24000 (b) 120000 (c) 1200 (d) 12000
3. 3.Which is closest to 903 × 69? (Round each number first.) (a) 6300 (b) 126000 (c) 630000 (d) 63000
4. 4.Which is closest to 404 + 901 + 202? (a) 1500 (b) 1400 (c) 1600 (d) 1700
5. 5.Which is closest to 301 × 80? (Round each number first.) (a) 48000 (b) 2400 (c) 24000 (d) 240000
6. 6.Round 11.67 to one decimal place. =
7. 7.Which is closest to 3192 ÷ 41? (a) 40 (b) 160 (c) 800 (d) 80
8. 8.Round 54.57 to one decimal place. =
9. 9.Which is closest to 2008 ÷ 39? (a) 500 (b) 100 (c) 50 (d) 25
10. 10.Which is closest to 797 × 50? (Round each number first.) (a) 80000 (b) 4000 (c) 400000 (d) 40000
11. 11.Which is closest to 901 + 302 + 295? (a) 1400 (b) 1500 (c) 1700 (d) 1600
12. 12.Round 66540 to the nearest thousand.
13. 13.Which is closest to 602 × 90? (Round each number first.) (a) 54000 (b) 5400 (c) 540000 (d) 108000
14. 14.Round 73.17 to one decimal place. =
15. 15.Which is closest to 596 × 59? (Round each number first.) (a) 72000 (b) 3600 (c) 36000 (d) 360000
16. 16.Which is closest to 403 + 801 + 705? (a) 2000 (b) 1900 (c) 2100 (d) 1800
17. 17.Which is closest to 601 × 71? (Round each number first.) (a) 84000 (b) 4200 (c) 42000 (d) 420000
18. 18.Which is closest to 296 × 48? (Round each number first.) (a) 150000 (b) 15000 (c) 30000 (d) 1500
19. 19.Round 58217 to the nearest ten.
20. 20.Which is closest to 899 × 69? (Round each number first.) (a) 630000 (b) 6300 (c) 63000 (d) 126000
21. 21.Which is closest to 800 × 41? (Round each number first.) (a) 320000 (b) 3200 (c) 64000 (d) 32000
22. 22.Which is closest to 105 + 599 + 801? (a) 1400 (b) 1500 (c) 1600 (d) 1700
23. 23.Round 12.06 to one decimal place. =
24. 24.Which is closest to 300 × 22? (Round each number first.) (a) 6000 (b) 12000 (c) 600 (d) 60000
25. 25.Round 61147 to the nearest ten.
26. 26.Which is closest to 799 + 197 + 500? (a) 1600 (b) 1500 (c) 1400 (d) 1700
27. 27.Which is closest to 802 ÷ 39? (a) 20 (b) 40 (c) 200 (d) 10
28. 28.Which is closest to 297 + 700 + 98? (a) 1300 (b) 1100 (c) 1000 (d) 1200
29. 29.Which is closest to 205 + 604 + 397? (a) 1400 (b) 1100 (c) 1200 (d) 1300
30. 30.Which is closest to 395 + 102 + 899? (a) 1500 (b) 1600 (c) 1400 (d) 1300
31. 31.Which is closest to 103 + 899 + 797? (a) 1800 (b) 2000 (c) 1900 (d) 1700
32. 32.Which is closest to 904 × 30? (Round each number first.) (a) 2700 (b) 270000 (c) 27000 (d) 54000
33. 33.Which is closest to 196 + 696 + 298? (a) 1300 (b) 1200 (c) 1400 (d) 1100
34. 34.Which is closest to 4503 ÷ 49? (a) 45 (b) 180 (c) 90 (d) 900
35. 35.Which is closest to 899 + 498 + 103? (a) 1400 (b) 1700 (c) 1600 (d) 1500
36. 36.Which is closest to 695 + 96 + 401? (a) 1400 (b) 1300 (c) 1200 (d) 1100
37. 37.Which is closest to 702 × 70? (Round each number first.) (a) 490000 (b) 49000 (c) 98000 (d) 4900
38. 38.Round 35.82 to one decimal place. =
39. 39.Which is closest to 701 + 98 + 495? (a) 1200 (b) 1300 (c) 1500 (d) 1400
40. 40.Which is closest to 991 ÷ 49? (a) 40 (b) 10 (c) 20 (d) 200

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