← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 268 · 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 73231 to the nearest hundred.
  2. 2.Round 48.84 to one decimal place. =
  3. 3.Round 15.22 to one decimal place. =
  4. 4.Which is closest to 202 × 19? (Round each number first.) (a) 400 (b) 40000 (c) 4000 (d) 8000
  5. 5.Which is closest to 601 + 705 + 500? (a) 1700 (b) 2000 (c) 1800 (d) 1900
  6. 6.Round 97.46 to one decimal place. =
  7. 7.Which is closest to 1607 ÷ 39? (a) 20 (b) 400 (c) 40 (d) 80
  8. 8.Which is closest to 398 ÷ 19? (a) 20 (b) 40 (c) 200 (d) 10
  9. 9.Which is closest to 904 + 498 + 497? (a) 1900 (b) 2100 (c) 2000 (d) 1800
  10. 10.Which is closest to 397 × 29? (Round each number first.) (a) 24000 (b) 120000 (c) 1200 (d) 12000
  11. 11.Round 42625 to the nearest hundred.
  12. 12.Which is closest to 495 + 195 + 298? (a) 1000 (b) 900 (c) 1100 (d) 1200
  13. 13.Which is closest to 402 × 39? (Round each number first.) (a) 160000 (b) 1600 (c) 32000 (d) 16000
  14. 14.Which is closest to 1200 ÷ 29? (a) 400 (b) 40 (c) 80 (d) 20
  15. 15.Round 66.88 to one decimal place. =
  16. 16.Round 28.33 to one decimal place. =
  17. 17.Round 33.46 to one decimal place. =
  18. 18.Round 42.89 to one decimal place. =
  19. 19.Round 22618 to the nearest ten.
  20. 20.Round 38.72 to one decimal place. =
  21. 21.Which is closest to 300 + 397 + 195? (a) 900 (b) 1100 (c) 800 (d) 1000
  22. 22.Round 20921 to the nearest hundred.
  23. 23.Round 25676 to the nearest hundred.
  24. 24.Which is closest to 596 × 22? (Round each number first.) (a) 12000 (b) 24000 (c) 1200 (d) 120000
  25. 25.Which is closest to 2995 ÷ 51? (a) 30 (b) 600 (c) 60 (d) 120
  26. 26.Round 26.62 to one decimal place. =
  27. 27.Round 45.52 to one decimal place. =
  28. 28.Round 67846 to the nearest hundred.
  29. 29.Round 43.59 to one decimal place. =
  30. 30.Round 70838 to the nearest ten.
  31. 31.Round 49502 to the nearest ten.
  32. 32.Round 39974 to the nearest thousand.
  33. 33.Round 43046 to the nearest ten.
  34. 34.Which is closest to 804 × 30? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
  35. 35.Round 47.86 to one decimal place. =
  36. 36.Which is closest to 802 × 78? (Round each number first.) (a) 64000 (b) 6400 (c) 640000 (d) 128000
  37. 37.Round 85740 to the nearest thousand.
  38. 38.Which is closest to 603 × 39? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
  39. 39.Round 53.59 to one decimal place. =
  40. 40.Which is closest to 2002 ÷ 49? (a) 20 (b) 400 (c) 80 (d) 40

Answer key

  1. 73200
  2. 48.8
  3. 15.2
  4. 4000
  5. 1800
  6. 97.5
  7. 40
  8. 20
  9. 1900
  10. 12000
  11. 42600
  12. 1000
  13. 16000
  14. 40
  15. 66.9
  16. 28.3
  17. 33.5
  18. 42.9
  19. 22620
  20. 38.7
  21. 900
  22. 20900
  23. 25700
  24. 12000
  25. 60
  26. 26.6
  27. 45.5
  28. 67800
  29. 43.6
  30. 70840
  31. 49500
  32. 40000
  33. 43050
  34. 24000
  35. 47.9
  36. 64000
  37. 86000
  38. 24000
  39. 53.6
  40. 40

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