← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 261 · 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 205 + 299 + 395? (a) 1000 (b) 1100 (c) 900 (d) 800
  2. 2.Round 90.83 to one decimal place. =
  3. 3.Which is closest to 1793 ÷ 21? (a) 45 (b) 900 (c) 180 (d) 90
  4. 4.Which is closest to 799 × 92? (Round each number first.) (a) 720000 (b) 72000 (c) 7200 (d) 144000
  5. 5.Which is closest to 701 + 403 + 197? (a) 1300 (b) 1200 (c) 1400 (d) 1500
  6. 6.Round 38.67 to one decimal place. =
  7. 7.Which is closest to 798 × 49? (Round each number first.) (a) 80000 (b) 4000 (c) 40000 (d) 400000
  8. 8.Which is closest to 402 + 699 + 105? (a) 1400 (b) 1200 (c) 1300 (d) 1100
  9. 9.Which is closest to 696 × 50? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
  10. 10.Round 24655 to the nearest hundred.
  11. 11.Round 66.16 to one decimal place. =
  12. 12.Which is closest to 1996 ÷ 39? (a) 25 (b) 100 (c) 50 (d) 500
  13. 13.Which is closest to 96 + 696 + 601? (a) 1600 (b) 1400 (c) 1500 (d) 1300
  14. 14.Which is closest to 2407 ÷ 39? (a) 30 (b) 60 (c) 120 (d) 600
  15. 15.Which is closest to 302 + 704 + 399? (a) 1600 (b) 1400 (c) 1300 (d) 1500
  16. 16.Which is closest to 396 × 29? (Round each number first.) (a) 120000 (b) 1200 (c) 24000 (d) 12000
  17. 17.Round 20.87 to one decimal place. =
  18. 18.Round 58866 to the nearest hundred.
  19. 19.Round 80.09 to one decimal place. =
  20. 20.Which is closest to 3500 ÷ 49? (a) 700 (b) 35 (c) 70 (d) 140
  21. 21.Which is closest to 298 × 91? (Round each number first.) (a) 27000 (b) 54000 (c) 270000 (d) 2700
  22. 22.Round 36.23 to one decimal place. =
  23. 23.Round 85413 to the nearest ten.
  24. 24.Round 89.08 to one decimal place. =
  25. 25.Round 58661 to the nearest thousand.
  26. 26.Which is closest to 502 + 895 + 905? (a) 2400 (b) 2200 (c) 2500 (d) 2300
  27. 27.Which is closest to 696 + 405 + 895? (a) 2000 (b) 2100 (c) 1900 (d) 2200
  28. 28.Which is closest to 198 × 41? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
  29. 29.Round 82796 to the nearest ten.
  30. 30.Which is closest to 396 + 295 + 595? (a) 1400 (b) 1300 (c) 1500 (d) 1200
  31. 31.Which is closest to 304 + 702 + 701? (a) 1800 (b) 1700 (c) 1600 (d) 1900
  32. 32.Round 33.12 to one decimal place. =
  33. 33.Which is closest to 705 + 900 + 304? (a) 1800 (b) 2000 (c) 2100 (d) 1900
  34. 34.Round 13886 to the nearest thousand.
  35. 35.Which is closest to 599 ÷ 31? (a) 10 (b) 40 (c) 20 (d) 200
  36. 36.Which is closest to 299 × 21? (Round each number first.) (a) 12000 (b) 60000 (c) 6000 (d) 600
  37. 37.Round 78.63 to one decimal place. =
  38. 38.Which is closest to 906 ÷ 29? (a) 300 (b) 60 (c) 30 (d) 15
  39. 39.Which is closest to 99 + 799 + 499? (a) 1400 (b) 1600 (c) 1500 (d) 1300
  40. 40.Which is closest to 799 × 79? (Round each number first.) (a) 128000 (b) 640000 (c) 6400 (d) 64000

Answer key

  1. 900
  2. 90.8
  3. 90
  4. 72000
  5. 1300
  6. 38.7
  7. 40000
  8. 1200
  9. 35000
  10. 24700
  11. 66.2
  12. 50
  13. 1400
  14. 60
  15. 1400
  16. 12000
  17. 20.9
  18. 58900
  19. 80.1
  20. 70
  21. 27000
  22. 36.2
  23. 85410
  24. 89.1
  25. 59000
  26. 2300
  27. 2000
  28. 8000
  29. 82800
  30. 1300
  31. 1700
  32. 33.1
  33. 1900
  34. 14000
  35. 20
  36. 6000
  37. 78.6
  38. 30
  39. 1400
  40. 64000

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