← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 786 · 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 500 × 69? (Round each number first.) (a) 35000 (b) 70000 (c) 3500 (d) 350000
  2. 2.Which is closest to 4492 ÷ 51? (a) 45 (b) 900 (c) 180 (d) 90
  3. 3.Round 53404 to the nearest thousand.
  4. 4.Which is closest to 601 + 602 + 202? (a) 1500 (b) 1300 (c) 1400 (d) 1600
  5. 5.Which is closest to 400 × 58? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  6. 6.Round 24385 to the nearest thousand.
  7. 7.Round 8981 to the nearest ten.
  8. 8.Round 96129 to the nearest ten.
  9. 9.Which is closest to 195 + 99 + 199? (a) 600 (b) 400 (c) 500 (d) 700
  10. 10.Which is closest to 796 + 796 + 700? (a) 2300 (b) 2400 (c) 2200 (d) 2500
  11. 11.Which is closest to 595 ÷ 19? (a) 30 (b) 15 (c) 300 (d) 60
  12. 12.Which is closest to 602 + 296 + 896? (a) 1700 (b) 1900 (c) 1800 (d) 2000
  13. 13.Which is closest to 798 × 19? (Round each number first.) (a) 160000 (b) 1600 (c) 32000 (d) 16000
  14. 14.Which is closest to 2398 ÷ 39? (a) 60 (b) 30 (c) 600 (d) 120
  15. 15.Round 76619 to the nearest ten.
  16. 16.Which is closest to 898 × 79? (Round each number first.) (a) 7200 (b) 720000 (c) 144000 (d) 72000
  17. 17.Which is closest to 596 × 60? (Round each number first.) (a) 3600 (b) 360000 (c) 72000 (d) 36000
  18. 18.Which is closest to 500 × 88? (Round each number first.) (a) 45000 (b) 90000 (c) 4500 (d) 450000
  19. 19.Which is closest to 202 × 88? (Round each number first.) (a) 18000 (b) 180000 (c) 36000 (d) 1800
  20. 20.Round 54183 to the nearest thousand.
  21. 21.Which is closest to 598 × 59? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  22. 22.Round 62.07 to one decimal place. =
  23. 23.Which is closest to 402 + 395 + 99? (a) 800 (b) 1100 (c) 900 (d) 1000
  24. 24.Which is closest to 204 × 42? (Round each number first.) (a) 16000 (b) 8000 (c) 800 (d) 80000
  25. 25.Which is closest to 898 + 603 + 403? (a) 2000 (b) 1800 (c) 2100 (d) 1900
  26. 26.Round 70397 to the nearest ten.
  27. 27.Which is closest to 803 × 49? (Round each number first.) (a) 80000 (b) 40000 (c) 4000 (d) 400000
  28. 28.Which is closest to 504 × 38? (Round each number first.) (a) 40000 (b) 200000 (c) 2000 (d) 20000
  29. 29.Round 41.84 to one decimal place. =
  30. 30.Which is closest to 602 + 396 + 497? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  31. 31.Which is closest to 400 + 602 + 99? (a) 1000 (b) 1300 (c) 1100 (d) 1200
  32. 32.Which is closest to 4499 ÷ 49? (a) 180 (b) 45 (c) 90 (d) 900
  33. 33.Round 76702 to the nearest thousand.
  34. 34.Which is closest to 597 + 295 + 196? (a) 1200 (b) 1300 (c) 1000 (d) 1100
  35. 35.Which is closest to 3206 ÷ 41? (a) 80 (b) 800 (c) 160 (d) 40
  36. 36.Which is closest to 95 + 699 + 405? (a) 1200 (b) 1300 (c) 1400 (d) 1100
  37. 37.Which is closest to 4506 ÷ 49? (a) 45 (b) 180 (c) 90 (d) 900
  38. 38.Round 58073 to the nearest hundred.
  39. 39.Round 30.46 to one decimal place. =
  40. 40.Which is closest to 3594 ÷ 41? (a) 45 (b) 900 (c) 180 (d) 90

Answer key

  1. 35000
  2. 90
  3. 53000
  4. 1400
  5. 24000
  6. 24000
  7. 8980
  8. 96130
  9. 500
  10. 2300
  11. 30
  12. 1800
  13. 16000
  14. 60
  15. 76620
  16. 72000
  17. 36000
  18. 45000
  19. 18000
  20. 54000
  21. 36000
  22. 62.1
  23. 900
  24. 8000
  25. 1900
  26. 70400
  27. 40000
  28. 20000
  29. 41.8
  30. 1500
  31. 1100
  32. 90
  33. 77000
  34. 1100
  35. 80
  36. 1200
  37. 90
  38. 58100
  39. 30.5
  40. 90

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