← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 602 · 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 76556 to the nearest thousand.
  2. 2.Round 28245 to the nearest thousand.
  3. 3.Which is closest to 2100 ÷ 29? (a) 140 (b) 700 (c) 70 (d) 35
  4. 4.Round 4274 to the nearest ten.
  5. 5.Round 23998 to the nearest hundred.
  6. 6.Round 30.83 to one decimal place. =
  7. 7.Which is closest to 705 + 798 + 200? (a) 1800 (b) 1700 (c) 1600 (d) 1900
  8. 8.Which is closest to 900 × 62? (Round each number first.) (a) 108000 (b) 540000 (c) 54000 (d) 5400
  9. 9.Which is closest to 2408 ÷ 31? (a) 80 (b) 800 (c) 40 (d) 160
  10. 10.Which is closest to 303 × 91? (Round each number first.) (a) 2700 (b) 54000 (c) 270000 (d) 27000
  11. 11.Which is closest to 400 × 69? (Round each number first.) (a) 28000 (b) 280000 (c) 2800 (d) 56000
  12. 12.Which is closest to 4506 ÷ 49? (a) 45 (b) 90 (c) 180 (d) 900
  13. 13.Round 33.46 to one decimal place. =
  14. 14.Which is closest to 902 + 704 + 202? (a) 2000 (b) 1700 (c) 1800 (d) 1900
  15. 15.Which is closest to 302 × 79? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
  16. 16.Which is closest to 705 + 596 + 304? (a) 1600 (b) 1700 (c) 1800 (d) 1500
  17. 17.Round 40699 to the nearest ten.
  18. 18.Which is closest to 505 + 695 + 97? (a) 1200 (b) 1500 (c) 1300 (d) 1400
  19. 19.Which is closest to 1994 ÷ 41? (a) 50 (b) 500 (c) 25 (d) 100
  20. 20.Which is closest to 3501 ÷ 49? (a) 140 (b) 700 (c) 70 (d) 35
  21. 21.Which is closest to 1005 ÷ 51? (a) 40 (b) 10 (c) 20 (d) 200
  22. 22.Which is closest to 502 × 50? (Round each number first.) (a) 25000 (b) 50000 (c) 250000 (d) 2500
  23. 23.Which is closest to 405 + 300 + 396? (a) 1200 (b) 1300 (c) 1100 (d) 1000
  24. 24.Which is closest to 2402 ÷ 41? (a) 120 (b) 600 (c) 30 (d) 60
  25. 25.Which is closest to 899 × 71? (Round each number first.) (a) 630000 (b) 126000 (c) 6300 (d) 63000
  26. 26.Which is closest to 504 × 30? (Round each number first.) (a) 15000 (b) 150000 (c) 30000 (d) 1500
  27. 27.Which is closest to 504 × 21? (Round each number first.) (a) 1000 (b) 20000 (c) 10000 (d) 100000
  28. 28.Which is closest to 102 + 304 + 497? (a) 1000 (b) 1100 (c) 900 (d) 800
  29. 29.Round 78.51 to one decimal place. =
  30. 30.Round 1809 to the nearest ten.
  31. 31.Round 58139 to the nearest hundred.
  32. 32.Which is closest to 595 + 100 + 702? (a) 1600 (b) 1400 (c) 1300 (d) 1500
  33. 33.Which is closest to 992 ÷ 21? (a) 100 (b) 25 (c) 500 (d) 50
  34. 34.Which is closest to 497 × 79? (Round each number first.) (a) 80000 (b) 400000 (c) 40000 (d) 4000
  35. 35.Round 77383 to the nearest ten.
  36. 36.Which is closest to 598 + 99 + 598? (a) 1500 (b) 1200 (c) 1300 (d) 1400
  37. 37.Which is closest to 900 × 32? (Round each number first.) (a) 2700 (b) 27000 (c) 270000 (d) 54000
  38. 38.Which is closest to 204 × 32? (Round each number first.) (a) 600 (b) 60000 (c) 6000 (d) 12000
  39. 39.Round 50327 to the nearest hundred.
  40. 40.Round 75139 to the nearest thousand.

Answer key

  1. 77000
  2. 28000
  3. 70
  4. 4270
  5. 24000
  6. 30.8
  7. 1700
  8. 54000
  9. 80
  10. 27000
  11. 28000
  12. 90
  13. 33.5
  14. 1800
  15. 24000
  16. 1600
  17. 40700
  18. 1300
  19. 50
  20. 70
  21. 20
  22. 25000
  23. 1100
  24. 60
  25. 63000
  26. 15000
  27. 10000
  28. 900
  29. 78.5
  30. 1810
  31. 58100
  32. 1400
  33. 50
  34. 40000
  35. 77380
  36. 1300
  37. 27000
  38. 6000
  39. 50300
  40. 75000

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