← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 290 · 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.Round 55.66 to one decimal place. =
  2. 2.Round 74.73 to one decimal place. =
  3. 3.Which is closest to 597 + 97 + 796? (a) 1700 (b) 1500 (c) 1400 (d) 1600
  4. 4.Round 65003 to the nearest thousand.
  5. 5.Which is closest to 302 × 79? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
  6. 6.Which is closest to 2408 ÷ 41? (a) 30 (b) 600 (c) 120 (d) 60
  7. 7.Which is closest to 102 + 298 + 299? (a) 800 (b) 900 (c) 600 (d) 700
  8. 8.Which is closest to 696 × 68? (Round each number first.) (a) 490000 (b) 4900 (c) 49000 (d) 98000
  9. 9.Which is closest to 896 × 89? (Round each number first.) (a) 810000 (b) 8100 (c) 162000 (d) 81000
  10. 10.Which is closest to 400 × 19? (Round each number first.) (a) 16000 (b) 800 (c) 80000 (d) 8000
  11. 11.Which is closest to 1000 ÷ 49? (a) 40 (b) 10 (c) 200 (d) 20
  12. 12.Which is closest to 1208 ÷ 19? (a) 60 (b) 120 (c) 30 (d) 600
  13. 13.Round 39.17 to one decimal place. =
  14. 14.Which is closest to 697 + 696 + 105? (a) 1700 (b) 1600 (c) 1400 (d) 1500
  15. 15.Which is closest to 401 + 398 + 497? (a) 1300 (b) 1400 (c) 1500 (d) 1200
  16. 16.Which is closest to 700 × 22? (Round each number first.) (a) 140000 (b) 14000 (c) 1400 (d) 28000
  17. 17.Which is closest to 1599 ÷ 19? (a) 800 (b) 80 (c) 160 (d) 40
  18. 18.Round 80.19 to one decimal place. =
  19. 19.Round 88.46 to one decimal place. =
  20. 20.Which is closest to 498 × 21? (Round each number first.) (a) 10000 (b) 100000 (c) 1000 (d) 20000
  21. 21.Which is closest to 203 + 197 + 701? (a) 1000 (b) 1100 (c) 1200 (d) 1300
  22. 22.Round 89682 to the nearest ten.
  23. 23.Round 55.94 to one decimal place. =
  24. 24.Which is closest to 498 + 898 + 802? (a) 2400 (b) 2200 (c) 2300 (d) 2100
  25. 25.Round 42204 to the nearest hundred.
  26. 26.Which is closest to 602 ÷ 31? (a) 20 (b) 40 (c) 10 (d) 200
  27. 27.Round 35395 to the nearest thousand.
  28. 28.Which is closest to 1194 ÷ 31? (a) 40 (b) 400 (c) 80 (d) 20
  29. 29.Round 10676 to the nearest ten.
  30. 30.Which is closest to 204 × 58? (Round each number first.) (a) 24000 (b) 12000 (c) 120000 (d) 1200
  31. 31.Round 32332 to the nearest ten.
  32. 32.Which is closest to 300 × 58? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
  33. 33.Which is closest to 603 × 80? (Round each number first.) (a) 96000 (b) 480000 (c) 48000 (d) 4800
  34. 34.Which is closest to 602 + 498 + 301? (a) 1400 (b) 1600 (c) 1500 (d) 1300
  35. 35.Round 51.31 to one decimal place. =
  36. 36.Round 86.09 to one decimal place. =
  37. 37.Which is closest to 903 + 195 + 198? (a) 1200 (b) 1500 (c) 1400 (d) 1300
  38. 38.Round 89.63 to one decimal place. =
  39. 39.Round 97191 to the nearest ten.
  40. 40.Round 46915 to the nearest hundred.

Answer key

  1. 55.7
  2. 74.7
  3. 1500
  4. 65000
  5. 24000
  6. 60
  7. 700
  8. 49000
  9. 81000
  10. 8000
  11. 20
  12. 60
  13. 39.2
  14. 1500
  15. 1300
  16. 14000
  17. 80
  18. 80.2
  19. 88.5
  20. 10000
  21. 1100
  22. 89680
  23. 55.9
  24. 2200
  25. 42200
  26. 20
  27. 35000
  28. 40
  29. 10680
  30. 12000
  31. 32330
  32. 18000
  33. 48000
  34. 1400
  35. 51.3
  36. 86.1
  37. 1300
  38. 89.6
  39. 97190
  40. 46900

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