← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 718 · 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 2992 ÷ 49? (a) 60 (b) 120 (c) 30 (d) 600
  2. 2.Round 12.71 to one decimal place. =
  3. 3.Which is closest to 301 × 92? (Round each number first.) (a) 2700 (b) 270000 (c) 54000 (d) 27000
  4. 4.Which is closest to 803 + 204 + 404? (a) 1600 (b) 1300 (c) 1400 (d) 1500
  5. 5.Round 98382 to the nearest ten.
  6. 6.Round 62.94 to one decimal place. =
  7. 7.Which is closest to 503 × 58? (Round each number first.) (a) 30000 (b) 300000 (c) 3000 (d) 60000
  8. 8.Which is closest to 701 × 68? (Round each number first.) (a) 4900 (b) 490000 (c) 98000 (d) 49000
  9. 9.Round 51.29 to one decimal place. =
  10. 10.Which is closest to 600 × 52? (Round each number first.) (a) 300000 (b) 3000 (c) 30000 (d) 60000
  11. 11.Which is closest to 1203 ÷ 31? (a) 20 (b) 80 (c) 400 (d) 40
  12. 12.Which is closest to 295 + 405 + 195? (a) 800 (b) 900 (c) 1100 (d) 1000
  13. 13.Round 17344 to the nearest hundred.
  14. 14.Round 10783 to the nearest ten.
  15. 15.Round 56.56 to one decimal place. =
  16. 16.Which is closest to 1593 ÷ 21? (a) 80 (b) 160 (c) 40 (d) 800
  17. 17.Which is closest to 401 × 22? (Round each number first.) (a) 16000 (b) 80000 (c) 8000 (d) 800
  18. 18.Round 76258 to the nearest hundred.
  19. 19.Round 89.58 to one decimal place. =
  20. 20.Which is closest to 99 + 295 + 796? (a) 1400 (b) 1100 (c) 1300 (d) 1200
  21. 21.Round 70826 to the nearest thousand.
  22. 22.Round 10.38 to one decimal place. =
  23. 23.Round 43.64 to one decimal place. =
  24. 24.Which is closest to 797 × 81? (Round each number first.) (a) 6400 (b) 640000 (c) 128000 (d) 64000
  25. 25.Round 40.44 to one decimal place. =
  26. 26.Which is closest to 105 + 495 + 900? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  27. 27.Which is closest to 802 + 595 + 595? (a) 1900 (b) 2200 (c) 2100 (d) 2000
  28. 28.Round 25637 to the nearest thousand.
  29. 29.Which is closest to 1999 ÷ 49? (a) 40 (b) 400 (c) 20 (d) 80
  30. 30.Which is closest to 3503 ÷ 51? (a) 35 (b) 700 (c) 140 (d) 70
  31. 31.Which is closest to 3991 ÷ 49? (a) 160 (b) 40 (c) 80 (d) 800
  32. 32.Which is closest to 1206 ÷ 39? (a) 30 (b) 300 (c) 60 (d) 15
  33. 33.Round 41.67 to one decimal place. =
  34. 34.Which is closest to 103 + 401 + 203? (a) 900 (b) 800 (c) 600 (d) 700
  35. 35.Round 21058 to the nearest ten.
  36. 36.Which is closest to 304 × 58? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  37. 37.Which is closest to 298 + 295 + 397? (a) 1100 (b) 1000 (c) 900 (d) 1200
  38. 38.Which is closest to 200 + 201 + 899? (a) 1500 (b) 1400 (c) 1200 (d) 1300
  39. 39.Which is closest to 905 + 596 + 696? (a) 2100 (b) 2300 (c) 2200 (d) 2400
  40. 40.Round 46.92 to one decimal place. =

Answer key

  1. 60
  2. 12.7
  3. 27000
  4. 1400
  5. 98380
  6. 62.9
  7. 30000
  8. 49000
  9. 51.3
  10. 30000
  11. 40
  12. 900
  13. 17300
  14. 10780
  15. 56.6
  16. 80
  17. 8000
  18. 76300
  19. 89.6
  20. 1200
  21. 71000
  22. 10.4
  23. 43.6
  24. 64000
  25. 40.4
  26. 1500
  27. 2000
  28. 26000
  29. 40
  30. 70
  31. 80
  32. 30
  33. 41.7
  34. 700
  35. 21060
  36. 18000
  37. 1000
  38. 1300
  39. 2200
  40. 46.9

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