← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 46 · 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 95.53 to one decimal place. =
  2. 2.Which is closest to 2800 ÷ 41? (a) 140 (b) 70 (c) 35 (d) 700
  3. 3.Which is closest to 202 + 897 + 199? (a) 1300 (b) 1400 (c) 1200 (d) 1500
  4. 4.Which is closest to 797 × 42? (Round each number first.) (a) 3200 (b) 64000 (c) 320000 (d) 32000
  5. 5.Which is closest to 701 + 704 + 895? (a) 2300 (b) 2500 (c) 2200 (d) 2400
  6. 6.Which is closest to 2401 ÷ 31? (a) 80 (b) 160 (c) 800 (d) 40
  7. 7.Round 33566 to the nearest ten.
  8. 8.Which is closest to 700 + 796 + 602? (a) 2300 (b) 2100 (c) 2200 (d) 2000
  9. 9.Round 82.77 to one decimal place. =
  10. 10.Round 56713 to the nearest thousand.
  11. 11.Which is closest to 499 × 51? (Round each number first.) (a) 250000 (b) 50000 (c) 2500 (d) 25000
  12. 12.Which is closest to 903 × 51? (Round each number first.) (a) 450000 (b) 45000 (c) 4500 (d) 90000
  13. 13.Which is closest to 201 × 51? (Round each number first.) (a) 10000 (b) 100000 (c) 20000 (d) 1000
  14. 14.Round 25.36 to one decimal place. =
  15. 15.Round 41.17 to one decimal place. =
  16. 16.Which is closest to 604 × 88? (Round each number first.) (a) 540000 (b) 54000 (c) 5400 (d) 108000
  17. 17.Which is closest to 403 × 62? (Round each number first.) (a) 24000 (b) 240000 (c) 48000 (d) 2400
  18. 18.Which is closest to 1801 ÷ 29? (a) 120 (b) 30 (c) 60 (d) 600
  19. 19.Round 35084 to the nearest hundred.
  20. 20.Round 11158 to the nearest ten.
  21. 21.Which is closest to 304 × 29? (Round each number first.) (a) 90000 (b) 9000 (c) 18000 (d) 900
  22. 22.Round 10.54 to one decimal place. =
  23. 23.Round 10.29 to one decimal place. =
  24. 24.Which is closest to 598 × 69? (Round each number first.) (a) 42000 (b) 84000 (c) 4200 (d) 420000
  25. 25.Which is closest to 798 + 202 + 203? (a) 1300 (b) 1400 (c) 1200 (d) 1100
  26. 26.Round 70460 to the nearest hundred.
  27. 27.Which is closest to 802 × 78? (Round each number first.) (a) 128000 (b) 640000 (c) 64000 (d) 6400
  28. 28.Round 32.94 to one decimal place. =
  29. 29.Which is closest to 104 + 95 + 602? (a) 700 (b) 900 (c) 800 (d) 1000
  30. 30.Which is closest to 196 × 42? (Round each number first.) (a) 800 (b) 16000 (c) 8000 (d) 80000
  31. 31.Round 50.73 to one decimal place. =
  32. 32.Which is closest to 798 × 32? (Round each number first.) (a) 48000 (b) 24000 (c) 2400 (d) 240000
  33. 33.Round 3411 to the nearest ten.
  34. 34.Which is closest to 900 + 397 + 401? (a) 1900 (b) 1600 (c) 1800 (d) 1700
  35. 35.Which is closest to 2496 ÷ 51? (a) 500 (b) 50 (c) 100 (d) 25
  36. 36.Which is closest to 296 + 796 + 595? (a) 1800 (b) 1600 (c) 1700 (d) 1900
  37. 37.Which is closest to 103 + 702 + 300? (a) 1300 (b) 1200 (c) 1000 (d) 1100
  38. 38.Which is closest to 400 ÷ 19? (a) 200 (b) 20 (c) 40 (d) 10
  39. 39.Round 5082 to the nearest thousand.
  40. 40.Which is closest to 797 + 496 + 196? (a) 1400 (b) 1600 (c) 1500 (d) 1700

Answer key

  1. 95.5
  2. 70
  3. 1300
  4. 32000
  5. 2300
  6. 80
  7. 33570
  8. 2100
  9. 82.8
  10. 57000
  11. 25000
  12. 45000
  13. 10000
  14. 25.4
  15. 41.2
  16. 54000
  17. 24000
  18. 60
  19. 35100
  20. 11160
  21. 9000
  22. 10.5
  23. 10.3
  24. 42000
  25. 1200
  26. 70500
  27. 64000
  28. 32.9
  29. 800
  30. 8000
  31. 50.7
  32. 24000
  33. 3410
  34. 1700
  35. 50
  36. 1700
  37. 1100
  38. 20
  39. 5000
  40. 1500

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