← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 132 · 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 35.83 to one decimal place. =
  2. 2.Which is closest to 202 × 20? (Round each number first.) (a) 40000 (b) 4000 (c) 400 (d) 8000
  3. 3.Which is closest to 704 + 196 + 904? (a) 2000 (b) 1700 (c) 1800 (d) 1900
  4. 4.Which is closest to 1503 ÷ 29? (a) 100 (b) 50 (c) 25 (d) 500
  5. 5.Which is closest to 797 ÷ 19? (a) 400 (b) 40 (c) 20 (d) 80
  6. 6.Round 15746 to the nearest hundred.
  7. 7.Which is closest to 600 × 69? (Round each number first.) (a) 84000 (b) 420000 (c) 4200 (d) 42000
  8. 8.Which is closest to 603 × 41? (Round each number first.) (a) 2400 (b) 240000 (c) 48000 (d) 24000
  9. 9.Which is closest to 702 × 69? (Round each number first.) (a) 98000 (b) 490000 (c) 49000 (d) 4900
  10. 10.Round 68.21 to one decimal place. =
  11. 11.Which is closest to 604 + 797 + 196? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  12. 12.Round 11.24 to one decimal place. =
  13. 13.Which is closest to 296 + 97 + 495? (a) 1000 (b) 1100 (c) 800 (d) 900
  14. 14.Which is closest to 2493 ÷ 51? (a) 100 (b) 25 (c) 50 (d) 500
  15. 15.Which is closest to 597 × 50? (Round each number first.) (a) 30000 (b) 300000 (c) 60000 (d) 3000
  16. 16.Which is closest to 99 + 301 + 199? (a) 500 (b) 700 (c) 800 (d) 600
  17. 17.Round 42409 to the nearest ten.
  18. 18.Which is closest to 797 + 400 + 201? (a) 1300 (b) 1500 (c) 1600 (d) 1400
  19. 19.Round 7195 to the nearest thousand.
  20. 20.Which is closest to 598 + 595 + 605? (a) 1700 (b) 1800 (c) 1900 (d) 2000
  21. 21.Which is closest to 2004 ÷ 51? (a) 40 (b) 20 (c) 80 (d) 400
  22. 22.Round 43609 to the nearest thousand.
  23. 23.Round 97453 to the nearest thousand.
  24. 24.Which is closest to 999 ÷ 19? (a) 100 (b) 500 (c) 25 (d) 50
  25. 25.Which is closest to 397 × 88? (Round each number first.) (a) 360000 (b) 72000 (c) 3600 (d) 36000
  26. 26.Which is closest to 204 + 395 + 402? (a) 1200 (b) 1100 (c) 900 (d) 1000
  27. 27.Which is closest to 2091 ÷ 29? (a) 700 (b) 70 (c) 140 (d) 35
  28. 28.Round 28.66 to one decimal place. =
  29. 29.Round 22.42 to one decimal place. =
  30. 30.Which is closest to 97 + 404 + 502? (a) 1000 (b) 1100 (c) 1200 (d) 900
  31. 31.Which is closest to 704 × 38? (Round each number first.) (a) 280000 (b) 56000 (c) 2800 (d) 28000
  32. 32.Round 84.48 to one decimal place. =
  33. 33.Which is closest to 698 + 905 + 200? (a) 1700 (b) 2000 (c) 1800 (d) 1900
  34. 34.Which is closest to 1609 ÷ 41? (a) 80 (b) 400 (c) 20 (d) 40
  35. 35.Round 38644 to the nearest ten.
  36. 36.Which is closest to 103 + 403 + 304? (a) 1000 (b) 900 (c) 700 (d) 800
  37. 37.Round 78.87 to one decimal place. =
  38. 38.Which is closest to 197 × 91? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  39. 39.Which is closest to 602 × 31? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  40. 40.Round 70.78 to one decimal place. =

Answer key

  1. 35.8
  2. 4000
  3. 1800
  4. 50
  5. 40
  6. 15700
  7. 42000
  8. 24000
  9. 49000
  10. 68.2
  11. 1600
  12. 11.2
  13. 900
  14. 50
  15. 30000
  16. 600
  17. 42410
  18. 1400
  19. 7000
  20. 1800
  21. 40
  22. 44000
  23. 97000
  24. 50
  25. 36000
  26. 1000
  27. 70
  28. 28.7
  29. 22.4
  30. 1000
  31. 28000
  32. 84.5
  33. 1800
  34. 40
  35. 38640
  36. 800
  37. 78.9
  38. 18000
  39. 18000
  40. 70.8

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