← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 599 · 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 2005 ÷ 41? (a) 25 (b) 500 (c) 50 (d) 100
  2. 2.Which is closest to 898 × 88? (Round each number first.) (a) 8100 (b) 810000 (c) 162000 (d) 81000
  3. 3.Which is closest to 403 × 89? (Round each number first.) (a) 36000 (b) 72000 (c) 3600 (d) 360000
  4. 4.Which is closest to 2409 ÷ 41? (a) 30 (b) 120 (c) 60 (d) 600
  5. 5.Which is closest to 897 ÷ 29? (a) 60 (b) 15 (c) 300 (d) 30
  6. 6.Which is closest to 4004 ÷ 49? (a) 800 (b) 80 (c) 160 (d) 40
  7. 7.Which is closest to 2999 ÷ 51? (a) 30 (b) 120 (c) 60 (d) 600
  8. 8.Which is closest to 895 + 699 + 696? (a) 2200 (b) 2400 (c) 2300 (d) 2500
  9. 9.Round 25142 to the nearest ten.
  10. 10.Round 56.28 to one decimal place. =
  11. 11.Which is closest to 1003 ÷ 51? (a) 20 (b) 10 (c) 40 (d) 200
  12. 12.Round 32.66 to one decimal place. =
  13. 13.Round 43575 to the nearest thousand.
  14. 14.Which is closest to 298 + 802 + 604? (a) 1800 (b) 1600 (c) 1900 (d) 1700
  15. 15.Which is closest to 3495 ÷ 49? (a) 140 (b) 700 (c) 70 (d) 35
  16. 16.Which is closest to 1409 ÷ 19? (a) 140 (b) 700 (c) 70 (d) 35
  17. 17.Which is closest to 900 + 496 + 297? (a) 1900 (b) 1600 (c) 1700 (d) 1800
  18. 18.Round 61813 to the nearest thousand.
  19. 19.Round 93917 to the nearest hundred.
  20. 20.Round 58749 to the nearest ten.
  21. 21.Which is closest to 398 × 50? (Round each number first.) (a) 40000 (b) 20000 (c) 2000 (d) 200000
  22. 22.Which is closest to 795 + 598 + 405? (a) 1800 (b) 2000 (c) 1900 (d) 1700
  23. 23.Which is closest to 703 + 302 + 505? (a) 1500 (b) 1400 (c) 1600 (d) 1700
  24. 24.Which is closest to 2702 ÷ 29? (a) 180 (b) 45 (c) 90 (d) 900
  25. 25.Round 92480 to the nearest hundred.
  26. 26.Which is closest to 703 + 904 + 399? (a) 2000 (b) 2200 (c) 1900 (d) 2100
  27. 27.Which is closest to 798 ÷ 19? (a) 40 (b) 20 (c) 80 (d) 400
  28. 28.Which is closest to 1802 ÷ 29? (a) 30 (b) 120 (c) 600 (d) 60
  29. 29.Which is closest to 897 × 42? (Round each number first.) (a) 3600 (b) 36000 (c) 72000 (d) 360000
  30. 30.Round 58846 to the nearest thousand.
  31. 31.Which is closest to 802 × 29? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
  32. 32.Round 58.28 to one decimal place. =
  33. 33.Round 71570 to the nearest hundred.
  34. 34.Which is closest to 1208 ÷ 31? (a) 20 (b) 80 (c) 400 (d) 40
  35. 35.Which is closest to 402 + 699 + 205? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  36. 36.Which is closest to 598 × 31? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
  37. 37.Which is closest to 403 × 60? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  38. 38.Which is closest to 100 + 896 + 203? (a) 1400 (b) 1300 (c) 1100 (d) 1200
  39. 39.Which is closest to 502 × 32? (Round each number first.) (a) 1500 (b) 30000 (c) 150000 (d) 15000
  40. 40.Which is closest to 891 ÷ 31? (a) 60 (b) 15 (c) 30 (d) 300

Answer key

  1. 50
  2. 81000
  3. 36000
  4. 60
  5. 30
  6. 80
  7. 60
  8. 2300
  9. 25140
  10. 56.3
  11. 20
  12. 32.7
  13. 44000
  14. 1700
  15. 70
  16. 70
  17. 1700
  18. 62000
  19. 93900
  20. 58750
  21. 20000
  22. 1800
  23. 1500
  24. 90
  25. 92500
  26. 2000
  27. 40
  28. 60
  29. 36000
  30. 59000
  31. 24000
  32. 58.3
  33. 71600
  34. 40
  35. 1300
  36. 18000
  37. 24000
  38. 1200
  39. 15000
  40. 30

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