← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 34 · 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 296 + 105 + 200? (a) 500 (b) 600 (c) 700 (d) 800
  2. 2.Which is closest to 599 + 204 + 96? (a) 1100 (b) 900 (c) 800 (d) 1000
  3. 3.Which is closest to 1598 ÷ 21? (a) 160 (b) 80 (c) 40 (d) 800
  4. 4.Which is closest to 4006 ÷ 51? (a) 800 (b) 80 (c) 40 (d) 160
  5. 5.Round 2510 to the nearest thousand.
  6. 6.Which is closest to 695 + 398 + 203? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  7. 7.Which is closest to 96 + 803 + 802? (a) 1800 (b) 1600 (c) 1900 (d) 1700
  8. 8.Which is closest to 296 × 21? (Round each number first.) (a) 60000 (b) 600 (c) 12000 (d) 6000
  9. 9.Which is closest to 503 × 70? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
  10. 10.Which is closest to 97 + 198 + 296? (a) 500 (b) 800 (c) 600 (d) 700
  11. 11.Which is closest to 405 + 201 + 495? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  12. 12.Round 45722 to the nearest thousand.
  13. 13.Round 60.73 to one decimal place. =
  14. 14.Round 29227 to the nearest thousand.
  15. 15.Which is closest to 798 × 92? (Round each number first.) (a) 7200 (b) 72000 (c) 720000 (d) 144000
  16. 16.Which is closest to 301 × 30? (Round each number first.) (a) 900 (b) 18000 (c) 9000 (d) 90000
  17. 17.Round 74.23 to one decimal place. =
  18. 18.Which is closest to 397 + 802 + 298? (a) 1400 (b) 1500 (c) 1600 (d) 1700
  19. 19.Round 59.72 to one decimal place. =
  20. 20.Round 43.59 to one decimal place. =
  21. 21.Which is closest to 604 ÷ 19? (a) 30 (b) 300 (c) 15 (d) 60
  22. 22.Which is closest to 1605 ÷ 39? (a) 400 (b) 20 (c) 80 (d) 40
  23. 23.Round 29728 to the nearest hundred.
  24. 24.Round 75.59 to one decimal place. =
  25. 25.Round 10.29 to one decimal place. =
  26. 26.Round 41.23 to one decimal place. =
  27. 27.Round 69.69 to one decimal place. =
  28. 28.Which is closest to 803 × 21? (Round each number first.) (a) 1600 (b) 32000 (c) 160000 (d) 16000
  29. 29.Which is closest to 396 × 71? (Round each number first.) (a) 280000 (b) 28000 (c) 56000 (d) 2800
  30. 30.Round 46.44 to one decimal place. =
  31. 31.Which is closest to 401 × 61? (Round each number first.) (a) 2400 (b) 48000 (c) 240000 (d) 24000
  32. 32.Which is closest to 399 × 61? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
  33. 33.Which is closest to 3495 ÷ 51? (a) 700 (b) 70 (c) 140 (d) 35
  34. 34.Which is closest to 900 + 603 + 395? (a) 2000 (b) 1800 (c) 2100 (d) 1900
  35. 35.Which is closest to 898 + 896 + 703? (a) 2700 (b) 2400 (c) 2500 (d) 2600
  36. 36.Which is closest to 604 × 21? (Round each number first.) (a) 1200 (b) 120000 (c) 12000 (d) 24000
  37. 37.Which is closest to 399 + 697 + 301? (a) 1300 (b) 1600 (c) 1400 (d) 1500
  38. 38.Round 93749 to the nearest thousand.
  39. 39.Which is closest to 796 × 88? (Round each number first.) (a) 7200 (b) 72000 (c) 720000 (d) 144000
  40. 40.Round 23.76 to one decimal place. =

Answer key

  1. 600
  2. 900
  3. 80
  4. 80
  5. 3000
  6. 1300
  7. 1700
  8. 6000
  9. 35000
  10. 600
  11. 1100
  12. 46000
  13. 60.7
  14. 29000
  15. 72000
  16. 9000
  17. 74.2
  18. 1500
  19. 59.7
  20. 43.6
  21. 30
  22. 40
  23. 29700
  24. 75.6
  25. 10.3
  26. 41.2
  27. 69.7
  28. 16000
  29. 28000
  30. 46.4
  31. 24000
  32. 24000
  33. 70
  34. 1900
  35. 2500
  36. 12000
  37. 1400
  38. 94000
  39. 72000
  40. 23.8

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