← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 976 · 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 201 × 29? (Round each number first.) (a) 6000 (b) 12000 (c) 60000 (d) 600
  2. 2.Which is closest to 798 + 603 + 801? (a) 2300 (b) 2200 (c) 2400 (d) 2100
  3. 3.Which is closest to 2795 ÷ 39? (a) 35 (b) 70 (c) 700 (d) 140
  4. 4.Which is closest to 199 × 48? (Round each number first.) (a) 100000 (b) 20000 (c) 1000 (d) 10000
  5. 5.Which is closest to 701 + 696 + 405? (a) 1700 (b) 1900 (c) 1800 (d) 2000
  6. 6.Round 54.66 to one decimal place. =
  7. 7.Which is closest to 801 × 88? (Round each number first.) (a) 72000 (b) 144000 (c) 7200 (d) 720000
  8. 8.Which is closest to 1509 ÷ 31? (a) 500 (b) 50 (c) 25 (d) 100
  9. 9.Round 83.67 to one decimal place. =
  10. 10.Which is closest to 300 + 100 + 404? (a) 900 (b) 700 (c) 1000 (d) 800
  11. 11.Which is closest to 503 × 70? (Round each number first.) (a) 70000 (b) 35000 (c) 3500 (d) 350000
  12. 12.Which is closest to 499 × 41? (Round each number first.) (a) 40000 (b) 200000 (c) 2000 (d) 20000
  13. 13.Round 57.28 to one decimal place. =
  14. 14.Round 94242 to the nearest ten.
  15. 15.Which is closest to 201 + 495 + 805? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  16. 16.Which is closest to 595 + 702 + 202? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  17. 17.Which is closest to 1798 ÷ 21? (a) 45 (b) 180 (c) 900 (d) 90
  18. 18.Round 6995 to the nearest thousand.
  19. 19.Which is closest to 2799 ÷ 39? (a) 35 (b) 140 (c) 70 (d) 700
  20. 20.Round 40034 to the nearest ten.
  21. 21.Which is closest to 300 × 42? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
  22. 22.Which is closest to 697 + 404 + 698? (a) 1700 (b) 1900 (c) 1800 (d) 2000
  23. 23.Which is closest to 606 ÷ 29? (a) 40 (b) 200 (c) 10 (d) 20
  24. 24.Which is closest to 198 + 295 + 503? (a) 1100 (b) 1200 (c) 900 (d) 1000
  25. 25.Round 93031 to the nearest hundred.
  26. 26.Which is closest to 600 + 396 + 399? (a) 1300 (b) 1600 (c) 1500 (d) 1400
  27. 27.Which is closest to 697 × 31? (Round each number first.) (a) 210000 (b) 2100 (c) 42000 (d) 21000
  28. 28.Which is closest to 794 ÷ 39? (a) 10 (b) 200 (c) 20 (d) 40
  29. 29.Which is closest to 1593 ÷ 19? (a) 800 (b) 40 (c) 80 (d) 160
  30. 30.Which is closest to 1608 ÷ 21? (a) 160 (b) 40 (c) 800 (d) 80
  31. 31.Which is closest to 95 + 195 + 803? (a) 1000 (b) 1200 (c) 1100 (d) 1300
  32. 32.Round 51009 to the nearest ten.
  33. 33.Round 54.39 to one decimal place. =
  34. 34.Which is closest to 499 + 102 + 195? (a) 700 (b) 800 (c) 1000 (d) 900
  35. 35.Round 52.83 to one decimal place. =
  36. 36.Which is closest to 798 + 96 + 99? (a) 1100 (b) 900 (c) 1200 (d) 1000
  37. 37.Which is closest to 3196 ÷ 39? (a) 40 (b) 160 (c) 80 (d) 800
  38. 38.Round 93.48 to one decimal place. =
  39. 39.Which is closest to 602 + 397 + 301? (a) 1500 (b) 1400 (c) 1200 (d) 1300
  40. 40.Which is closest to 903 + 895 + 597? (a) 2300 (b) 2500 (c) 2600 (d) 2400

Answer key

  1. 6000
  2. 2200
  3. 70
  4. 10000
  5. 1800
  6. 54.7
  7. 72000
  8. 50
  9. 83.7
  10. 800
  11. 35000
  12. 20000
  13. 57.3
  14. 94240
  15. 1500
  16. 1500
  17. 90
  18. 7000
  19. 70
  20. 40030
  21. 12000
  22. 1800
  23. 20
  24. 1000
  25. 93000
  26. 1400
  27. 21000
  28. 20
  29. 80
  30. 80
  31. 1100
  32. 51010
  33. 54.4
  34. 800
  35. 52.8
  36. 1000
  37. 80
  38. 93.5
  39. 1300
  40. 2400

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