← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 859 · 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 606 ÷ 31? (a) 200 (b) 40 (c) 10 (d) 20
  2. 2.Which is closest to 396 × 38? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
  3. 3.Round 79.32 to one decimal place. =
  4. 4.Which is closest to 802 + 501 + 496? (a) 1900 (b) 2000 (c) 1800 (d) 1700
  5. 5.Round 81.88 to one decimal place. =
  6. 6.Which is closest to 804 + 700 + 895? (a) 2300 (b) 2400 (c) 2500 (d) 2600
  7. 7.Which is closest to 396 + 804 + 500? (a) 1600 (b) 1700 (c) 1900 (d) 1800
  8. 8.Which is closest to 801 + 300 + 795? (a) 2000 (b) 2100 (c) 1800 (d) 1900
  9. 9.Which is closest to 398 × 70? (Round each number first.) (a) 2800 (b) 28000 (c) 280000 (d) 56000
  10. 10.Round 71.16 to one decimal place. =
  11. 11.Which is closest to 200 × 38? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
  12. 12.Round 65092 to the nearest thousand.
  13. 13.Which is closest to 602 + 95 + 603? (a) 1500 (b) 1200 (c) 1300 (d) 1400
  14. 14.Round 69.84 to one decimal place. =
  15. 15.Which is closest to 595 + 500 + 197? (a) 1200 (b) 1400 (c) 1300 (d) 1500
  16. 16.Round 36.49 to one decimal place. =
  17. 17.Which is closest to 1208 ÷ 29? (a) 20 (b) 80 (c) 400 (d) 40
  18. 18.Which is closest to 196 + 902 + 895? (a) 2100 (b) 2200 (c) 2000 (d) 1900
  19. 19.Which is closest to 801 × 20? (Round each number first.) (a) 160000 (b) 1600 (c) 16000 (d) 32000
  20. 20.Which is closest to 3004 ÷ 51? (a) 120 (b) 60 (c) 600 (d) 30
  21. 21.Which is closest to 594 ÷ 31? (a) 200 (b) 10 (c) 40 (d) 20
  22. 22.Round 20605 to the nearest hundred.
  23. 23.Round 7698 to the nearest ten.
  24. 24.Round 38.76 to one decimal place. =
  25. 25.Round 18085 to the nearest thousand.
  26. 26.Round 91991 to the nearest thousand.
  27. 27.Which is closest to 904 × 19? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
  28. 28.Round 36258 to the nearest hundred.
  29. 29.Which is closest to 702 + 302 + 97? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  30. 30.Which is closest to 591 ÷ 19? (a) 15 (b) 60 (c) 300 (d) 30
  31. 31.Which is closest to 298 × 29? (Round each number first.) (a) 900 (b) 18000 (c) 90000 (d) 9000
  32. 32.Which is closest to 400 + 602 + 596? (a) 1500 (b) 1800 (c) 1700 (d) 1600
  33. 33.Round 45.21 to one decimal place. =
  34. 34.Round 19102 to the nearest hundred.
  35. 35.Which is closest to 198 × 31? (Round each number first.) (a) 12000 (b) 600 (c) 60000 (d) 6000
  36. 36.Which is closest to 799 ÷ 21? (a) 400 (b) 80 (c) 40 (d) 20
  37. 37.Round 70.46 to one decimal place. =
  38. 38.Which is closest to 99 + 95 + 302? (a) 700 (b) 400 (c) 500 (d) 600
  39. 39.Which is closest to 896 × 32? (Round each number first.) (a) 270000 (b) 54000 (c) 27000 (d) 2700
  40. 40.Which is closest to 1805 ÷ 19? (a) 90 (b) 180 (c) 45 (d) 900

Answer key

  1. 20
  2. 16000
  3. 79.3
  4. 1800
  5. 81.9
  6. 2400
  7. 1700
  8. 1900
  9. 28000
  10. 71.2
  11. 8000
  12. 65000
  13. 1300
  14. 69.8
  15. 1300
  16. 36.5
  17. 40
  18. 2000
  19. 16000
  20. 60
  21. 20
  22. 20600
  23. 7700
  24. 38.8
  25. 18000
  26. 92000
  27. 18000
  28. 36300
  29. 1100
  30. 30
  31. 9000
  32. 1600
  33. 45.2
  34. 19100
  35. 6000
  36. 40
  37. 70.5
  38. 500
  39. 27000
  40. 90

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