← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 334 · 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 204 × 80? (Round each number first.) (a) 160000 (b) 1600 (c) 16000 (d) 32000
  2. 2.Round 71406 to the nearest ten.
  3. 3.Round 9140 to the nearest hundred.
  4. 4.Which is closest to 899 × 48? (Round each number first.) (a) 4500 (b) 450000 (c) 90000 (d) 45000
  5. 5.Which is closest to 96 + 601 + 195? (a) 800 (b) 1000 (c) 1100 (d) 900
  6. 6.Round 22501 to the nearest ten.
  7. 7.Which is closest to 203 × 38? (Round each number first.) (a) 8000 (b) 16000 (c) 800 (d) 80000
  8. 8.Round 32.56 to one decimal place. =
  9. 9.Round 83148 to the nearest thousand.
  10. 10.Which is closest to 1996 ÷ 49? (a) 80 (b) 20 (c) 400 (d) 40
  11. 11.Round 51.38 to one decimal place. =
  12. 12.Round 74722 to the nearest hundred.
  13. 13.Round 16110 to the nearest hundred.
  14. 14.Which is closest to 398 ÷ 21? (a) 10 (b) 40 (c) 20 (d) 200
  15. 15.Round 30.73 to one decimal place. =
  16. 16.Round 10686 to the nearest thousand.
  17. 17.Which is closest to 697 + 905 + 896? (a) 2700 (b) 2500 (c) 2600 (d) 2400
  18. 18.Round 23628 to the nearest hundred.
  19. 19.Which is closest to 500 + 404 + 298? (a) 1300 (b) 1200 (c) 1100 (d) 1400
  20. 20.Which is closest to 398 × 20? (Round each number first.) (a) 80000 (b) 8000 (c) 800 (d) 16000
  21. 21.Round 34.13 to one decimal place. =
  22. 22.Which is closest to 898 + 102 + 495? (a) 1500 (b) 1700 (c) 1400 (d) 1600
  23. 23.Round 21.44 to one decimal place. =
  24. 24.Which is closest to 196 × 31? (Round each number first.) (a) 6000 (b) 12000 (c) 600 (d) 60000
  25. 25.Which is closest to 2397 ÷ 29? (a) 160 (b) 800 (c) 40 (d) 80
  26. 26.Which is closest to 798 × 70? (Round each number first.) (a) 112000 (b) 5600 (c) 560000 (d) 56000
  27. 27.Round 15.09 to one decimal place. =
  28. 28.Which is closest to 1394 ÷ 21? (a) 140 (b) 700 (c) 35 (d) 70
  29. 29.Round 79.92 to one decimal place. =
  30. 30.Round 76.51 to one decimal place. =
  31. 31.Which is closest to 1596 ÷ 41? (a) 400 (b) 20 (c) 40 (d) 80
  32. 32.Which is closest to 301 × 29? (Round each number first.) (a) 900 (b) 18000 (c) 9000 (d) 90000
  33. 33.Round 28.59 to one decimal place. =
  34. 34.Round 57.68 to one decimal place. =
  35. 35.Round 62.44 to one decimal place. =
  36. 36.Which is closest to 599 ÷ 19? (a) 60 (b) 300 (c) 30 (d) 15
  37. 37.Which is closest to 702 × 18? (Round each number first.) (a) 14000 (b) 1400 (c) 140000 (d) 28000
  38. 38.Which is closest to 599 + 96 + 303? (a) 1100 (b) 900 (c) 1200 (d) 1000
  39. 39.Round 60056 to the nearest hundred.
  40. 40.Which is closest to 800 + 299 + 599? (a) 1900 (b) 1800 (c) 1600 (d) 1700

Answer key

  1. 16000
  2. 71410
  3. 9100
  4. 45000
  5. 900
  6. 22500
  7. 8000
  8. 32.6
  9. 83000
  10. 40
  11. 51.4
  12. 74700
  13. 16100
  14. 20
  15. 30.7
  16. 11000
  17. 2500
  18. 23600
  19. 1200
  20. 8000
  21. 34.1
  22. 1500
  23. 21.4
  24. 6000
  25. 80
  26. 56000
  27. 15.1
  28. 70
  29. 79.9
  30. 76.5
  31. 40
  32. 9000
  33. 28.6
  34. 57.7
  35. 62.4
  36. 30
  37. 14000
  38. 1000
  39. 60100
  40. 1700

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