← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 400 · 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 296 + 303 + 99? (a) 600 (b) 700 (c) 800 (d) 900
  2. 2.Which is closest to 898 × 68? (Round each number first.) (a) 126000 (b) 6300 (c) 630000 (d) 63000
  3. 3.Which is closest to 496 + 200 + 297? (a) 1200 (b) 900 (c) 1000 (d) 1100
  4. 4.Which is closest to 2398 ÷ 29? (a) 160 (b) 80 (c) 40 (d) 800
  5. 5.Which is closest to 801 + 599 + 100? (a) 1500 (b) 1600 (c) 1700 (d) 1400
  6. 6.Round 23.19 to one decimal place. =
  7. 7.Which is closest to 799 × 49? (Round each number first.) (a) 80000 (b) 400000 (c) 4000 (d) 40000
  8. 8.Which is closest to 496 + 698 + 602? (a) 1900 (b) 1800 (c) 1700 (d) 2000
  9. 9.Which is closest to 2491 ÷ 51? (a) 25 (b) 500 (c) 50 (d) 100
  10. 10.Round 20004 to the nearest hundred.
  11. 11.Which is closest to 395 + 98 + 703? (a) 1100 (b) 1200 (c) 1300 (d) 1400
  12. 12.Which is closest to 2995 ÷ 49? (a) 120 (b) 60 (c) 30 (d) 600
  13. 13.Which is closest to 2392 ÷ 39? (a) 120 (b) 600 (c) 30 (d) 60
  14. 14.Which is closest to 596 + 895 + 705? (a) 2100 (b) 2200 (c) 2300 (d) 2400
  15. 15.Round 10.86 to one decimal place. =
  16. 16.Which is closest to 4499 ÷ 49? (a) 180 (b) 90 (c) 45 (d) 900
  17. 17.Round 37204 to the nearest ten.
  18. 18.Which is closest to 3595 ÷ 39? (a) 180 (b) 900 (c) 90 (d) 45
  19. 19.Which is closest to 103 + 297 + 903? (a) 1200 (b) 1400 (c) 1500 (d) 1300
  20. 20.Which is closest to 295 + 795 + 198? (a) 1200 (b) 1500 (c) 1300 (d) 1400
  21. 21.Which is closest to 699 × 18? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
  22. 22.Which is closest to 398 ÷ 21? (a) 10 (b) 40 (c) 20 (d) 200
  23. 23.Round 93532 to the nearest thousand.
  24. 24.Round 45.81 to one decimal place. =
  25. 25.Round 77541 to the nearest ten.
  26. 26.Round 85497 to the nearest thousand.
  27. 27.Round 40294 to the nearest ten.
  28. 28.Which is closest to 1806 ÷ 31? (a) 30 (b) 600 (c) 120 (d) 60
  29. 29.Round 80.42 to one decimal place. =
  30. 30.Round 72451 to the nearest hundred.
  31. 31.Round 32102 to the nearest ten.
  32. 32.Round 54.07 to one decimal place. =
  33. 33.Which is closest to 197 × 41? (Round each number first.) (a) 8000 (b) 800 (c) 16000 (d) 80000
  34. 34.Round 31912 to the nearest thousand.
  35. 35.Which is closest to 802 × 19? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
  36. 36.Which is closest to 4008 ÷ 49? (a) 800 (b) 160 (c) 40 (d) 80
  37. 37.Round 48.82 to one decimal place. =
  38. 38.Which is closest to 591 ÷ 19? (a) 30 (b) 15 (c) 60 (d) 300
  39. 39.Which is closest to 1804 ÷ 19? (a) 45 (b) 90 (c) 900 (d) 180
  40. 40.Round 4073 to the nearest ten.

Answer key

  1. 700
  2. 63000
  3. 1000
  4. 80
  5. 1500
  6. 23.2
  7. 40000
  8. 1800
  9. 50
  10. 20000
  11. 1200
  12. 60
  13. 60
  14. 2200
  15. 10.9
  16. 90
  17. 37200
  18. 90
  19. 1300
  20. 1300
  21. 14000
  22. 20
  23. 94000
  24. 45.8
  25. 77540
  26. 85000
  27. 40290
  28. 60
  29. 80.4
  30. 72500
  31. 32100
  32. 54.1
  33. 8000
  34. 32000
  35. 16000
  36. 80
  37. 48.8
  38. 30
  39. 90
  40. 4070

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