← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 6 · 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 197 × 71? (Round each number first.) (a) 1400 (b) 28000 (c) 140000 (d) 14000
  2. 2.Round 13482 to the nearest ten.
  3. 3.Which is closest to 1994 ÷ 51? (a) 80 (b) 400 (c) 20 (d) 40
  4. 4.Which is closest to 4502 ÷ 49? (a) 45 (b) 90 (c) 900 (d) 180
  5. 5.Round 70.77 to one decimal place. =
  6. 6.Which is closest to 304 × 82? (Round each number first.) (a) 2400 (b) 24000 (c) 48000 (d) 240000
  7. 7.Which is closest to 203 × 92? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
  8. 8.Which is closest to 496 × 21? (Round each number first.) (a) 100000 (b) 1000 (c) 10000 (d) 20000
  9. 9.Round 40186 to the nearest ten.
  10. 10.Round 9070 to the nearest hundred.
  11. 11.Which is closest to 297 × 41? (Round each number first.) (a) 24000 (b) 120000 (c) 1200 (d) 12000
  12. 12.Which is closest to 804 × 32? (Round each number first.) (a) 24000 (b) 2400 (c) 240000 (d) 48000
  13. 13.Which is closest to 898 × 72? (Round each number first.) (a) 630000 (b) 63000 (c) 6300 (d) 126000
  14. 14.Which is closest to 3203 ÷ 39? (a) 160 (b) 800 (c) 80 (d) 40
  15. 15.Which is closest to 202 + 200 + 202? (a) 500 (b) 700 (c) 600 (d) 800
  16. 16.Which is closest to 794 ÷ 21? (a) 20 (b) 80 (c) 400 (d) 40
  17. 17.Which is closest to 297 × 21? (Round each number first.) (a) 60000 (b) 12000 (c) 6000 (d) 600
  18. 18.Which is closest to 503 + 804 + 197? (a) 1400 (b) 1700 (c) 1600 (d) 1500
  19. 19.Which is closest to 797 + 95 + 705? (a) 1500 (b) 1800 (c) 1600 (d) 1700
  20. 20.Round 68.44 to one decimal place. =
  21. 21.Which is closest to 696 + 198 + 600? (a) 1600 (b) 1700 (c) 1400 (d) 1500
  22. 22.Which is closest to 695 + 395 + 501? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  23. 23.Which is closest to 203 × 31? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
  24. 24.Which is closest to 798 × 52? (Round each number first.) (a) 4000 (b) 40000 (c) 80000 (d) 400000
  25. 25.Round 96.92 to one decimal place. =
  26. 26.Which is closest to 1492 ÷ 49? (a) 60 (b) 30 (c) 15 (d) 300
  27. 27.Which is closest to 599 × 92? (Round each number first.) (a) 54000 (b) 5400 (c) 540000 (d) 108000
  28. 28.Round 83.77 to one decimal place. =
  29. 29.Which is closest to 798 ÷ 19? (a) 40 (b) 400 (c) 80 (d) 20
  30. 30.Which is closest to 901 + 502 + 401? (a) 2000 (b) 1900 (c) 1700 (d) 1800
  31. 31.Which is closest to 1402 ÷ 19? (a) 70 (b) 140 (c) 700 (d) 35
  32. 32.Round 16292 to the nearest ten.
  33. 33.Which is closest to 802 + 96 + 698? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  34. 34.Round 82374 to the nearest ten.
  35. 35.Round 7438 to the nearest ten.
  36. 36.Round 15105 to the nearest hundred.
  37. 37.Which is closest to 203 × 20? (Round each number first.) (a) 400 (b) 8000 (c) 40000 (d) 4000
  38. 38.Round 52.08 to one decimal place. =
  39. 39.Round 12.46 to one decimal place. =
  40. 40.Which is closest to 802 ÷ 21? (a) 40 (b) 400 (c) 80 (d) 20

Answer key

  1. 14000
  2. 13480
  3. 40
  4. 90
  5. 70.8
  6. 24000
  7. 18000
  8. 10000
  9. 40190
  10. 9100
  11. 12000
  12. 24000
  13. 63000
  14. 80
  15. 600
  16. 40
  17. 6000
  18. 1500
  19. 1600
  20. 68.4
  21. 1500
  22. 1600
  23. 6000
  24. 40000
  25. 96.9
  26. 30
  27. 54000
  28. 83.8
  29. 40
  30. 1800
  31. 70
  32. 16290
  33. 1600
  34. 82370
  35. 7440
  36. 15100
  37. 4000
  38. 52.1
  39. 12.5
  40. 40

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