← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 208 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.Which is closest to 905 ÷ 31? (a) 300 (b) 60 (c) 15 (d) 30
  2. 2.Which is closest to 899 × 89? (Round each number first.) (a) 8100 (b) 810000 (c) 162000 (d) 81000
  3. 3.Which is closest to 496 + 95 + 895? (a) 1600 (b) 1500 (c) 1400 (d) 1700
  4. 4.Round 34.86 to one decimal place. =
  5. 5.Which is closest to 503 × 28? (Round each number first.) (a) 1500 (b) 15000 (c) 30000 (d) 150000
  6. 6.Round 95.58 to one decimal place. =
  7. 7.Round 92.69 to one decimal place. =
  8. 8.Round 31311 to the nearest ten.
  9. 9.Which is closest to 594 ÷ 19? (a) 300 (b) 30 (c) 60 (d) 15
  10. 10.Which is closest to 903 × 81? (Round each number first.) (a) 144000 (b) 72000 (c) 7200 (d) 720000
  11. 11.Which is closest to 2001 ÷ 49? (a) 20 (b) 40 (c) 80 (d) 400
  12. 12.Which is closest to 2693 ÷ 29? (a) 45 (b) 180 (c) 900 (d) 90
  13. 13.Which is closest to 995 ÷ 51? (a) 40 (b) 10 (c) 20 (d) 200
  14. 14.Round 1621 to the nearest ten.
  15. 15.Round 80251 to the nearest thousand.
  16. 16.Round 47.84 to one decimal place. =
  17. 17.Which is closest to 593 ÷ 29? (a) 20 (b) 40 (c) 200 (d) 10
  18. 18.Which is closest to 697 + 298 + 302? (a) 1200 (b) 1300 (c) 1500 (d) 1400
  19. 19.Which is closest to 701 × 88? (Round each number first.) (a) 6300 (b) 126000 (c) 630000 (d) 63000
  20. 20.Which is closest to 296 × 52? (Round each number first.) (a) 1500 (b) 150000 (c) 15000 (d) 30000
  21. 21.Which is closest to 204 × 22? (Round each number first.) (a) 8000 (b) 400 (c) 40000 (d) 4000
  22. 22.Round 78.84 to one decimal place. =
  23. 23.Which is closest to 404 ÷ 19? (a) 40 (b) 20 (c) 200 (d) 10
  24. 24.Which is closest to 402 ÷ 19? (a) 20 (b) 10 (c) 200 (d) 40
  25. 25.Which is closest to 305 + 696 + 599? (a) 1700 (b) 1500 (c) 1600 (d) 1800
  26. 26.Which is closest to 1204 ÷ 39? (a) 300 (b) 15 (c) 60 (d) 30
  27. 27.Which is closest to 902 + 504 + 603? (a) 2000 (b) 2100 (c) 1900 (d) 2200
  28. 28.Which is closest to 898 × 79? (Round each number first.) (a) 720000 (b) 7200 (c) 144000 (d) 72000
  29. 29.Which is closest to 301 × 68? (Round each number first.) (a) 21000 (b) 42000 (c) 210000 (d) 2100
  30. 30.Which is closest to 400 × 31? (Round each number first.) (a) 24000 (b) 1200 (c) 12000 (d) 120000
  31. 31.Which is closest to 497 × 88? (Round each number first.) (a) 450000 (b) 45000 (c) 90000 (d) 4500
  32. 32.Round 46.13 to one decimal place. =
  33. 33.Which is closest to 1594 ÷ 19? (a) 800 (b) 40 (c) 80 (d) 160
  34. 34.Round 65864 to the nearest hundred.
  35. 35.Which is closest to 897 × 50? (Round each number first.) (a) 90000 (b) 45000 (c) 4500 (d) 450000
  36. 36.Which is closest to 1593 ÷ 39? (a) 400 (b) 80 (c) 20 (d) 40
  37. 37.Which is closest to 2109 ÷ 29? (a) 35 (b) 70 (c) 140 (d) 700
  38. 38.Which is closest to 502 + 895 + 903? (a) 2400 (b) 2500 (c) 2300 (d) 2200
  39. 39.Round 93.32 to one decimal place. =
  40. 40.Which is closest to 205 + 404 + 495? (a) 1300 (b) 1100 (c) 1200 (d) 1000

Answer key

  1. 30
  2. 81000
  3. 1500
  4. 34.9
  5. 15000
  6. 95.6
  7. 92.7
  8. 31310
  9. 30
  10. 72000
  11. 40
  12. 90
  13. 20
  14. 1620
  15. 80000
  16. 47.8
  17. 20
  18. 1300
  19. 63000
  20. 15000
  21. 4000
  22. 78.8
  23. 20
  24. 20
  25. 1600
  26. 30
  27. 2000
  28. 72000
  29. 21000
  30. 12000
  31. 45000
  32. 46.1
  33. 80
  34. 65900
  35. 45000
  36. 40
  37. 70
  38. 2300
  39. 93.3
  40. 1100

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude