Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 430 · 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 42.54 to one decimal place. =
2. 2.Which is closest to 803 × 58? (Round each number first.) (a) 4800 (b) 96000 (c) 48000 (d) 480000
3. 3.Which is closest to 302 × 81? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
4. 4.Which is closest to 700 + 804 + 897? (a) 2300 (b) 2400 (c) 2600 (d) 2500
5. 5.Which is closest to 500 × 39? (Round each number first.) (a) 40000 (b) 2000 (c) 20000 (d) 200000
6. 6.Round 64727 to the nearest hundred.
7. 7.Which is closest to 2708 ÷ 29? (a) 45 (b) 180 (c) 90 (d) 900
8. 8.Which is closest to 800 ÷ 21? (a) 40 (b) 80 (c) 400 (d) 20
9. 9.Round 36892 to the nearest hundred.
10. 10.Which is closest to 904 × 21? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
11. 11.Which is closest to 996 ÷ 49? (a) 20 (b) 40 (c) 200 (d) 10
12. 12.Round 44.14 to one decimal place. =
13. 13.Which is closest to 400 × 78? (Round each number first.) (a) 320000 (b) 32000 (c) 3200 (d) 64000
14. 14.Round 94744 to the nearest ten.
15. 15.Which is closest to 1009 ÷ 21? (a) 50 (b) 25 (c) 100 (d) 500
16. 16.Which is closest to 397 × 69? (Round each number first.) (a) 56000 (b) 2800 (c) 28000 (d) 280000
17. 17.Which is closest to 598 ÷ 21? (a) 60 (b) 30 (c) 15 (d) 300
18. 18.Round 36.78 to one decimal place. =
19. 19.Which is closest to 1197 ÷ 39? (a) 300 (b) 60 (c) 15 (d) 30
20. 20.Round 84139 to the nearest thousand.
21. 21.Round 27.56 to one decimal place. =
22. 22.Which is closest to 896 + 99 + 902? (a) 2000 (b) 1800 (c) 1900 (d) 2100
23. 23.Which is closest to 906 ÷ 31? (a) 15 (b) 30 (c) 300 (d) 60
24. 24.Which is closest to 598 × 38? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
25. 25.Which is closest to 296 + 496 + 599? (a) 1400 (b) 1600 (c) 1500 (d) 1300
26. 26.Round 2199 to the nearest ten.
27. 27.Which is closest to 699 × 92? (Round each number first.) (a) 63000 (b) 630000 (c) 126000 (d) 6300
28. 28.Round 97185 to the nearest thousand.
29. 29.Round 60169 to the nearest ten.
30. 30.Which is closest to 700 × 42? (Round each number first.) (a) 280000 (b) 28000 (c) 2800 (d) 56000
31. 31.Round 60.86 to one decimal place. =
32. 32.Which is closest to 399 × 22? (Round each number first.) (a) 16000 (b) 80000 (c) 800 (d) 8000
33. 33.Round 46270 to the nearest thousand.
34. 34.Which is closest to 599 × 60? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
35. 35.Which is closest to 203 + 704 + 395? (a) 1200 (b) 1400 (c) 1500 (d) 1300
36. 36.Which is closest to 2095 ÷ 31? (a) 70 (b) 35 (c) 140 (d) 700
37. 37.Which is closest to 203 × 70? (Round each number first.) (a) 140000 (b) 14000 (c) 1400 (d) 28000
38. 38.Round 73.36 to one decimal place. =
39. 39.Round 53.57 to one decimal place. =
40. 40.Round 34111 to the nearest thousand.

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