Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 738 · 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 14.57 to one decimal place. =
2. 2.Which is closest to 696 + 97 + 901? (a) 1900 (b) 1600 (c) 1800 (d) 1700
3. 3.Which is closest to 496 × 19? (Round each number first.) (a) 1000 (b) 10000 (c) 20000 (d) 100000
4. 4.Which is closest to 798 × 89? (Round each number first.) (a) 72000 (b) 7200 (c) 144000 (d) 720000
5. 5.Round 21.32 to one decimal place. =
6. 6.Which is closest to 1005 ÷ 21? (a) 25 (b) 50 (c) 100 (d) 500
7. 7.Round 32.46 to one decimal place. =
8. 8.Which is closest to 599 × 28? (Round each number first.) (a) 180000 (b) 1800 (c) 18000 (d) 36000
9. 9.Which is closest to 500 + 497 + 496? (a) 1700 (b) 1400 (c) 1500 (d) 1600
10. 10.Which is closest to 1195 ÷ 41? (a) 300 (b) 60 (c) 30 (d) 15
11. 11.Which is closest to 501 + 898 + 500? (a) 1900 (b) 2100 (c) 1800 (d) 2000
12. 12.Which is closest to 3998 ÷ 51? (a) 160 (b) 80 (c) 40 (d) 800
13. 13.Which is closest to 695 + 101 + 304? (a) 1200 (b) 1300 (c) 1000 (d) 1100
14. 14.Which is closest to 498 + 798 + 203? (a) 1700 (b) 1400 (c) 1600 (d) 1500
15. 15.Which is closest to 896 × 22? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
16. 16.Round 9039 to the nearest ten.
17. 17.Which is closest to 598 + 202 + 899? (a) 1900 (b) 1600 (c) 1700 (d) 1800
18. 18.Which is closest to 701 + 504 + 805? (a) 2100 (b) 1900 (c) 2200 (d) 2000
19. 19.Round 79871 to the nearest thousand.
20. 20.Which is closest to 896 × 19? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
21. 21.Which is closest to 802 + 900 + 798? (a) 2400 (b) 2600 (c) 2700 (d) 2500
22. 22.Which is closest to 3591 ÷ 39? (a) 90 (b) 45 (c) 900 (d) 180
23. 23.Which is closest to 703 × 81? (Round each number first.) (a) 5600 (b) 112000 (c) 560000 (d) 56000
24. 24.Which is closest to 803 + 103 + 500? (a) 1400 (b) 1300 (c) 1500 (d) 1600
25. 25.Which is closest to 600 + 305 + 201? (a) 1000 (b) 1100 (c) 1200 (d) 1300
26. 26.Which is closest to 101 + 499 + 300? (a) 900 (b) 1100 (c) 1000 (d) 800
27. 27.Which is closest to 405 + 98 + 703? (a) 1200 (b) 1400 (c) 1300 (d) 1100
28. 28.Which is closest to 1002 ÷ 49? (a) 200 (b) 10 (c) 20 (d) 40
29. 29.Which is closest to 805 + 696 + 199? (a) 1600 (b) 1700 (c) 1800 (d) 1900
30. 30.Which is closest to 396 + 697 + 195? (a) 1400 (b) 1200 (c) 1300 (d) 1500
31. 31.Which is closest to 201 × 52? (Round each number first.) (a) 1000 (b) 20000 (c) 100000 (d) 10000
32. 32.Which is closest to 1403 ÷ 19? (a) 700 (b) 140 (c) 35 (d) 70
33. 33.Which is closest to 896 × 79? (Round each number first.) (a) 7200 (b) 720000 (c) 144000 (d) 72000
34. 34.Which is closest to 598 × 79? (Round each number first.) (a) 480000 (b) 48000 (c) 4800 (d) 96000
35. 35.Round 49860 to the nearest hundred.
36. 36.Round 11.58 to one decimal place. =
37. 37.Which is closest to 898 + 100 + 397? (a) 1300 (b) 1600 (c) 1400 (d) 1500
38. 38.Round 18.12 to one decimal place. =
39. 39.Which is closest to 4498 ÷ 51? (a) 180 (b) 90 (c) 45 (d) 900
40. 40.Which is closest to 705 + 496 + 202? (a) 1300 (b) 1500 (c) 1600 (d) 1400

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