← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 415 · 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 95039 to the nearest hundred.
  2. 2.Which is closest to 198 × 92? (Round each number first.) (a) 180000 (b) 36000 (c) 1800 (d) 18000
  3. 3.Round 89404 to the nearest ten.
  4. 4.Which is closest to 3995 ÷ 49? (a) 80 (b) 40 (c) 800 (d) 160
  5. 5.Which is closest to 1202 ÷ 21? (a) 600 (b) 120 (c) 30 (d) 60
  6. 6.Round 19491 to the nearest ten.
  7. 7.Round 23.73 to one decimal place. =
  8. 8.Round 92645 to the nearest hundred.
  9. 9.Which is closest to 105 + 895 + 799? (a) 1700 (b) 2000 (c) 1900 (d) 1800
  10. 10.Which is closest to 398 × 50? (Round each number first.) (a) 20000 (b) 2000 (c) 40000 (d) 200000
  11. 11.Round 60.83 to one decimal place. =
  12. 12.Round 26.51 to one decimal place. =
  13. 13.Round 38.14 to one decimal place. =
  14. 14.Which is closest to 1208 ÷ 39? (a) 15 (b) 300 (c) 30 (d) 60
  15. 15.Which is closest to 98 + 597 + 904? (a) 1500 (b) 1700 (c) 1800 (d) 1600
  16. 16.Which is closest to 600 × 31? (Round each number first.) (a) 36000 (b) 18000 (c) 180000 (d) 1800
  17. 17.Which is closest to 298 × 82? (Round each number first.) (a) 2400 (b) 240000 (c) 24000 (d) 48000
  18. 18.Which is closest to 591 ÷ 21? (a) 15 (b) 300 (c) 60 (d) 30
  19. 19.Which is closest to 1205 ÷ 31? (a) 20 (b) 400 (c) 40 (d) 80
  20. 20.Round 54.31 to one decimal place. =
  21. 21.Round 52.32 to one decimal place. =
  22. 22.Round 31131 to the nearest ten.
  23. 23.Which is closest to 298 × 30? (Round each number first.) (a) 90000 (b) 900 (c) 18000 (d) 9000
  24. 24.Round 92998 to the nearest hundred.
  25. 25.Which is closest to 703 + 701 + 98? (a) 1700 (b) 1600 (c) 1500 (d) 1400
  26. 26.Round 77.67 to one decimal place. =
  27. 27.Which is closest to 397 + 104 + 95? (a) 500 (b) 600 (c) 800 (d) 700
  28. 28.Which is closest to 802 × 30? (Round each number first.) (a) 48000 (b) 2400 (c) 240000 (d) 24000
  29. 29.Which is closest to 403 + 596 + 700? (a) 1600 (b) 1700 (c) 1800 (d) 1900
  30. 30.Which is closest to 199 × 91? (Round each number first.) (a) 1800 (b) 36000 (c) 180000 (d) 18000
  31. 31.Round 23.36 to one decimal place. =
  32. 32.Round 21570 to the nearest hundred.
  33. 33.Round 82.72 to one decimal place. =
  34. 34.Which is closest to 793 ÷ 41? (a) 40 (b) 10 (c) 20 (d) 200
  35. 35.Which is closest to 2991 ÷ 49? (a) 30 (b) 120 (c) 60 (d) 600
  36. 36.Which is closest to 196 × 38? (Round each number first.) (a) 80000 (b) 800 (c) 16000 (d) 8000
  37. 37.Round 8737 to the nearest hundred.
  38. 38.Which is closest to 598 × 29? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
  39. 39.Which is closest to 701 × 29? (Round each number first.) (a) 210000 (b) 42000 (c) 2100 (d) 21000
  40. 40.Round 33.58 to one decimal place. =

Answer key

  1. 95000
  2. 18000
  3. 89400
  4. 80
  5. 60
  6. 19490
  7. 23.7
  8. 92600
  9. 1800
  10. 20000
  11. 60.8
  12. 26.5
  13. 38.1
  14. 30
  15. 1600
  16. 18000
  17. 24000
  18. 30
  19. 40
  20. 54.3
  21. 52.3
  22. 31130
  23. 9000
  24. 93000
  25. 1500
  26. 77.7
  27. 600
  28. 24000
  29. 1700
  30. 18000
  31. 23.4
  32. 21600
  33. 82.7
  34. 20
  35. 60
  36. 8000
  37. 8700
  38. 18000
  39. 21000
  40. 33.6

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