← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 398 · 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 98 + 695 + 702? (a) 1500 (b) 1700 (c) 1600 (d) 1400
  2. 2.Which is closest to 2504 ÷ 51? (a) 25 (b) 100 (c) 500 (d) 50
  3. 3.Round 78.32 to one decimal place. =
  4. 4.Which is closest to 400 × 19? (Round each number first.) (a) 80000 (b) 16000 (c) 800 (d) 8000
  5. 5.Round 35.13 to one decimal place. =
  6. 6.Which is closest to 203 × 61? (Round each number first.) (a) 24000 (b) 120000 (c) 12000 (d) 1200
  7. 7.Which is closest to 197 + 400 + 204? (a) 900 (b) 800 (c) 700 (d) 1000
  8. 8.Which is closest to 599 + 699 + 302? (a) 1600 (b) 1500 (c) 1700 (d) 1800
  9. 9.Round 89.48 to one decimal place. =
  10. 10.Round 45834 to the nearest thousand.
  11. 11.Which is closest to 697 × 21? (Round each number first.) (a) 28000 (b) 140000 (c) 1400 (d) 14000
  12. 12.Round 84693 to the nearest ten.
  13. 13.Round 61020 to the nearest hundred.
  14. 14.Which is closest to 1502 ÷ 51? (a) 30 (b) 60 (c) 300 (d) 15
  15. 15.Which is closest to 3197 ÷ 41? (a) 80 (b) 800 (c) 40 (d) 160
  16. 16.Which is closest to 2106 ÷ 29? (a) 35 (b) 70 (c) 700 (d) 140
  17. 17.Round 22.34 to one decimal place. =
  18. 18.Which is closest to 697 × 29? (Round each number first.) (a) 21000 (b) 42000 (c) 210000 (d) 2100
  19. 19.Round 4474 to the nearest ten.
  20. 20.Which is closest to 902 × 18? (Round each number first.) (a) 180000 (b) 36000 (c) 18000 (d) 1800
  21. 21.Round 68296 to the nearest hundred.
  22. 22.Which is closest to 903 × 42? (Round each number first.) (a) 36000 (b) 360000 (c) 3600 (d) 72000
  23. 23.Round 46.91 to one decimal place. =
  24. 24.Round 63293 to the nearest thousand.
  25. 25.Which is closest to 202 + 699 + 898? (a) 1800 (b) 1900 (c) 2000 (d) 1700
  26. 26.Which is closest to 97 + 297 + 699? (a) 1000 (b) 1300 (c) 1100 (d) 1200
  27. 27.Which is closest to 301 × 69? (Round each number first.) (a) 2100 (b) 21000 (c) 42000 (d) 210000
  28. 28.Round 13.41 to one decimal place. =
  29. 29.Round 40.51 to one decimal place. =
  30. 30.Which is closest to 197 × 89? (Round each number first.) (a) 1800 (b) 180000 (c) 36000 (d) 18000
  31. 31.Round 2072 to the nearest thousand.
  32. 32.Round 62.66 to one decimal place. =
  33. 33.Which is closest to 1200 ÷ 31? (a) 80 (b) 40 (c) 400 (d) 20
  34. 34.Which is closest to 500 × 41? (Round each number first.) (a) 200000 (b) 20000 (c) 40000 (d) 2000
  35. 35.Round 39134 to the nearest ten.
  36. 36.Round 74.22 to one decimal place. =
  37. 37.Round 4998 to the nearest thousand.
  38. 38.Round 69.62 to one decimal place. =
  39. 39.Which is closest to 903 × 79? (Round each number first.) (a) 720000 (b) 144000 (c) 72000 (d) 7200
  40. 40.Which is closest to 891 ÷ 31? (a) 60 (b) 15 (c) 300 (d) 30

Answer key

  1. 1500
  2. 50
  3. 78.3
  4. 8000
  5. 35.1
  6. 12000
  7. 800
  8. 1600
  9. 89.5
  10. 46000
  11. 14000
  12. 84690
  13. 61000
  14. 30
  15. 80
  16. 70
  17. 22.3
  18. 21000
  19. 4470
  20. 18000
  21. 68300
  22. 36000
  23. 46.9
  24. 63000
  25. 1800
  26. 1100
  27. 21000
  28. 13.4
  29. 40.5
  30. 18000
  31. 2000
  32. 62.7
  33. 40
  34. 20000
  35. 39130
  36. 74.2
  37. 5000
  38. 69.6
  39. 72000
  40. 30

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