← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 317 · 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 697 × 19? (Round each number first.) (a) 28000 (b) 1400 (c) 14000 (d) 140000
  2. 2.Which is closest to 1205 ÷ 29? (a) 20 (b) 40 (c) 80 (d) 400
  3. 3.Which is closest to 798 + 900 + 401? (a) 2200 (b) 2100 (c) 2000 (d) 2300
  4. 4.Which is closest to 99 + 305 + 97? (a) 700 (b) 400 (c) 600 (d) 500
  5. 5.Which is closest to 898 × 48? (Round each number first.) (a) 450000 (b) 90000 (c) 4500 (d) 45000
  6. 6.Round 61.82 to one decimal place. =
  7. 7.Which is closest to 503 × 61? (Round each number first.) (a) 30000 (b) 3000 (c) 300000 (d) 60000
  8. 8.Round 54707 to the nearest hundred.
  9. 9.Round 87239 to the nearest thousand.
  10. 10.Which is closest to 201 + 702 + 802? (a) 1800 (b) 1600 (c) 1700 (d) 1900
  11. 11.Which is closest to 396 × 41? (Round each number first.) (a) 32000 (b) 1600 (c) 16000 (d) 160000
  12. 12.Which is closest to 801 ÷ 39? (a) 200 (b) 40 (c) 10 (d) 20
  13. 13.Round 33.26 to one decimal place. =
  14. 14.Round 38.62 to one decimal place. =
  15. 15.Round 34.48 to one decimal place. =
  16. 16.Which is closest to 391 ÷ 21? (a) 20 (b) 200 (c) 10 (d) 40
  17. 17.Round 93851 to the nearest hundred.
  18. 18.Round 97.41 to one decimal place. =
  19. 19.Which is closest to 596 + 598 + 199? (a) 1600 (b) 1500 (c) 1400 (d) 1300
  20. 20.Round 55.82 to one decimal place. =
  21. 21.Round 46518 to the nearest thousand.
  22. 22.Round 39.64 to one decimal place. =
  23. 23.Round 79388 to the nearest thousand.
  24. 24.Round 67.29 to one decimal place. =
  25. 25.Which is closest to 402 ÷ 19? (a) 200 (b) 10 (c) 20 (d) 40
  26. 26.Round 11318 to the nearest ten.
  27. 27.Round 63914 to the nearest hundred.
  28. 28.Round 5620 to the nearest hundred.
  29. 29.Which is closest to 904 ÷ 29? (a) 15 (b) 300 (c) 60 (d) 30
  30. 30.Which is closest to 1503 ÷ 51? (a) 15 (b) 300 (c) 30 (d) 60
  31. 31.Which is closest to 401 × 18? (Round each number first.) (a) 80000 (b) 16000 (c) 8000 (d) 800
  32. 32.Which is closest to 2802 ÷ 39? (a) 700 (b) 35 (c) 70 (d) 140
  33. 33.Which is closest to 799 × 28? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  34. 34.Which is closest to 196 × 88? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  35. 35.Round 20740 to the nearest hundred.
  36. 36.Which is closest to 1203 ÷ 39? (a) 60 (b) 30 (c) 300 (d) 15
  37. 37.Round 71015 to the nearest hundred.
  38. 38.Round 31.09 to one decimal place. =
  39. 39.Which is closest to 404 × 50? (Round each number first.) (a) 2000 (b) 40000 (c) 200000 (d) 20000
  40. 40.Round 40249 to the nearest ten.

Answer key

  1. 14000
  2. 40
  3. 2100
  4. 500
  5. 45000
  6. 61.8
  7. 30000
  8. 54700
  9. 87000
  10. 1700
  11. 16000
  12. 20
  13. 33.3
  14. 38.6
  15. 34.5
  16. 20
  17. 93900
  18. 97.4
  19. 1400
  20. 55.8
  21. 47000
  22. 39.6
  23. 79000
  24. 67.3
  25. 20
  26. 11320
  27. 63900
  28. 5600
  29. 30
  30. 30
  31. 8000
  32. 70
  33. 24000
  34. 18000
  35. 20700
  36. 30
  37. 71000
  38. 31.1
  39. 20000
  40. 40250

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