Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 663 · 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 805 ÷ 19? (a) 80 (b) 400 (c) 20 (d) 40
2. 2.Which is closest to 598 × 29? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
3. 3.Which is closest to 596 ÷ 19? (a) 60 (b) 300 (c) 30 (d) 15
4. 4.Which is closest to 803 ÷ 41? (a) 10 (b) 40 (c) 20 (d) 200
5. 5.Round 39174 to the nearest ten.
6. 6.Round 35680 to the nearest hundred.
7. 7.Which is closest to 96 + 203 + 605? (a) 1000 (b) 900 (c) 800 (d) 1100
8. 8.Which is closest to 396 × 48? (Round each number first.) (a) 20000 (b) 2000 (c) 200000 (d) 40000
9. 9.Round 70993 to the nearest ten.
10. 10.Which is closest to 302 × 51? (Round each number first.) (a) 150000 (b) 1500 (c) 30000 (d) 15000
11. 11.Which is closest to 1193 ÷ 29? (a) 20 (b) 40 (c) 80 (d) 400
12. 12.Round 50966 to the nearest ten.
13. 13.Which is closest to 796 × 40? (Round each number first.) (a) 32000 (b) 320000 (c) 3200 (d) 64000
14. 14.Which is closest to 902 × 18? (Round each number first.) (a) 1800 (b) 180000 (c) 18000 (d) 36000
15. 15.Which is closest to 1994 ÷ 49? (a) 40 (b) 80 (c) 20 (d) 400
16. 16.Which is closest to 901 + 102 + 101? (a) 1100 (b) 1300 (c) 1000 (d) 1200
17. 17.Round 13.58 to one decimal place. =
18. 18.Which is closest to 602 × 38? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
19. 19.Round 2757 to the nearest thousand.
20. 20.Round 27.29 to one decimal place. =
21. 21.Which is closest to 802 × 50? (Round each number first.) (a) 4000 (b) 80000 (c) 40000 (d) 400000
22. 22.Round 84695 to the nearest hundred.
23. 23.Which is closest to 199 × 58? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
24. 24.Which is closest to 800 × 72? (Round each number first.) (a) 5600 (b) 560000 (c) 56000 (d) 112000
25. 25.Which is closest to 202 × 41? (Round each number first.) (a) 8000 (b) 16000 (c) 800 (d) 80000
26. 26.Which is closest to 1194 ÷ 31? (a) 400 (b) 20 (c) 80 (d) 40
27. 27.Which is closest to 2694 ÷ 31? (a) 900 (b) 180 (c) 45 (d) 90
28. 28.Which is closest to 298 × 18? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
29. 29.Which is closest to 405 + 195 + 200? (a) 700 (b) 900 (c) 800 (d) 1000
30. 30.Which is closest to 704 × 38? (Round each number first.) (a) 28000 (b) 2800 (c) 280000 (d) 56000
31. 31.Round 72309 to the nearest ten.
32. 32.Which is closest to 497 × 52? (Round each number first.) (a) 2500 (b) 50000 (c) 25000 (d) 250000
33. 33.Which is closest to 204 + 401 + 696? (a) 1400 (b) 1300 (c) 1200 (d) 1500
34. 34.Which is closest to 297 × 59? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
35. 35.Which is closest to 304 + 301 + 603? (a) 1400 (b) 1200 (c) 1100 (d) 1300
36. 36.Round 94150 to the nearest thousand.
37. 37.Round 27818 to the nearest ten.
38. 38.Round 33.11 to one decimal place. =
39. 39.Round 49.61 to one decimal place. =
40. 40.Which is closest to 596 × 28? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000

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