← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 994 · 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 1809 ÷ 19? (a) 180 (b) 45 (c) 900 (d) 90
  2. 2.Which is closest to 1409 ÷ 21? (a) 35 (b) 140 (c) 700 (d) 70
  3. 3.Round 85579 to the nearest hundred.
  4. 4.Round 57592 to the nearest ten.
  5. 5.Round 64.16 to one decimal place. =
  6. 6.Which is closest to 901 × 29? (Round each number first.) (a) 270000 (b) 54000 (c) 2700 (d) 27000
  7. 7.Round 12.56 to one decimal place. =
  8. 8.Round 11678 to the nearest ten.
  9. 9.Which is closest to 201 + 597 + 799? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  10. 10.Round 12147 to the nearest thousand.
  11. 11.Which is closest to 2702 ÷ 29? (a) 900 (b) 180 (c) 90 (d) 45
  12. 12.Which is closest to 996 ÷ 21? (a) 100 (b) 50 (c) 25 (d) 500
  13. 13.Which is closest to 1194 ÷ 29? (a) 400 (b) 80 (c) 40 (d) 20
  14. 14.Which is closest to 903 + 101 + 98? (a) 1300 (b) 1100 (c) 1200 (d) 1000
  15. 15.Which is closest to 593 ÷ 19? (a) 30 (b) 60 (c) 300 (d) 15
  16. 16.Which is closest to 1607 ÷ 39? (a) 20 (b) 400 (c) 80 (d) 40
  17. 17.Which is closest to 504 × 28? (Round each number first.) (a) 30000 (b) 150000 (c) 1500 (d) 15000
  18. 18.Round 32.09 to one decimal place. =
  19. 19.Which is closest to 3503 ÷ 51? (a) 35 (b) 70 (c) 700 (d) 140
  20. 20.Which is closest to 1194 ÷ 19? (a) 600 (b) 30 (c) 120 (d) 60
  21. 21.Which is closest to 104 + 101 + 502? (a) 800 (b) 600 (c) 900 (d) 700
  22. 22.Round 2979 to the nearest hundred.
  23. 23.Which is closest to 392 ÷ 19? (a) 10 (b) 40 (c) 20 (d) 200
  24. 24.Round 52.29 to one decimal place. =
  25. 25.Which is closest to 304 × 92? (Round each number first.) (a) 54000 (b) 27000 (c) 270000 (d) 2700
  26. 26.Round 23.53 to one decimal place. =
  27. 27.Which is closest to 196 × 38? (Round each number first.) (a) 800 (b) 8000 (c) 80000 (d) 16000
  28. 28.Which is closest to 1007 ÷ 19? (a) 50 (b) 500 (c) 100 (d) 25
  29. 29.Which is closest to 805 ÷ 41? (a) 10 (b) 20 (c) 200 (d) 40
  30. 30.Which is closest to 304 + 803 + 704? (a) 1900 (b) 1700 (c) 2000 (d) 1800
  31. 31.Which is closest to 1607 ÷ 21? (a) 40 (b) 800 (c) 80 (d) 160
  32. 32.Round 60494 to the nearest hundred.
  33. 33.Round 99.26 to one decimal place. =
  34. 34.Which is closest to 599 × 28? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
  35. 35.Which is closest to 399 × 38? (Round each number first.) (a) 32000 (b) 16000 (c) 1600 (d) 160000
  36. 36.Which is closest to 604 × 70? (Round each number first.) (a) 84000 (b) 4200 (c) 420000 (d) 42000
  37. 37.Round 55.11 to one decimal place. =
  38. 38.Round 63.64 to one decimal place. =
  39. 39.Which is closest to 205 + 896 + 704? (a) 1800 (b) 2000 (c) 1900 (d) 1700
  40. 40.Which is closest to 2805 ÷ 41? (a) 70 (b) 700 (c) 140 (d) 35

Answer key

  1. 90
  2. 70
  3. 85600
  4. 57590
  5. 64.2
  6. 27000
  7. 12.6
  8. 11680
  9. 1600
  10. 12000
  11. 90
  12. 50
  13. 40
  14. 1100
  15. 30
  16. 40
  17. 15000
  18. 32.1
  19. 70
  20. 60
  21. 700
  22. 3000
  23. 20
  24. 52.3
  25. 27000
  26. 23.5
  27. 8000
  28. 50
  29. 20
  30. 1800
  31. 80
  32. 60500
  33. 99.3
  34. 18000
  35. 16000
  36. 42000
  37. 55.1
  38. 63.6
  39. 1800
  40. 70

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