← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 211 · 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 63.52 to one decimal place. =
  2. 2.Round 5335 to the nearest hundred.
  3. 3.Round 44855 to the nearest hundred.
  4. 4.Which is closest to 200 × 88? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
  5. 5.Round 43668 to the nearest hundred.
  6. 6.Round 64289 to the nearest ten.
  7. 7.Round 33.14 to one decimal place. =
  8. 8.Which is closest to 903 × 78? (Round each number first.) (a) 7200 (b) 72000 (c) 720000 (d) 144000
  9. 9.Which is closest to 395 + 603 + 105? (a) 1000 (b) 1300 (c) 1200 (d) 1100
  10. 10.Round 95.16 to one decimal place. =
  11. 11.Round 40152 to the nearest thousand.
  12. 12.Round 77789 to the nearest hundred.
  13. 13.Which is closest to 799 + 801 + 99? (a) 1600 (b) 1800 (c) 1900 (d) 1700
  14. 14.Which is closest to 798 × 88? (Round each number first.) (a) 720000 (b) 7200 (c) 144000 (d) 72000
  15. 15.Which is closest to 796 ÷ 19? (a) 400 (b) 20 (c) 40 (d) 80
  16. 16.Which is closest to 2997 ÷ 51? (a) 600 (b) 60 (c) 30 (d) 120
  17. 17.Round 8534 to the nearest ten.
  18. 18.Which is closest to 705 + 796 + 504? (a) 1900 (b) 2200 (c) 2000 (d) 2100
  19. 19.Round 31806 to the nearest ten.
  20. 20.Which is closest to 896 × 80? (Round each number first.) (a) 144000 (b) 7200 (c) 72000 (d) 720000
  21. 21.Which is closest to 3502 ÷ 49? (a) 70 (b) 35 (c) 140 (d) 700
  22. 22.Round 2962 to the nearest ten.
  23. 23.Which is closest to 204 × 89? (Round each number first.) (a) 18000 (b) 36000 (c) 180000 (d) 1800
  24. 24.Which is closest to 1196 ÷ 39? (a) 60 (b) 15 (c) 30 (d) 300
  25. 25.Round 31.71 to one decimal place. =
  26. 26.Which is closest to 799 + 98 + 98? (a) 1000 (b) 1100 (c) 1200 (d) 900
  27. 27.Which is closest to 2402 ÷ 31? (a) 800 (b) 80 (c) 40 (d) 160
  28. 28.Which is closest to 401 × 20? (Round each number first.) (a) 16000 (b) 8000 (c) 800 (d) 80000
  29. 29.Round 61.18 to one decimal place. =
  30. 30.Round 50058 to the nearest hundred.
  31. 31.Round 24033 to the nearest thousand.
  32. 32.Round 22797 to the nearest ten.
  33. 33.Which is closest to 201 × 89? (Round each number first.) (a) 180000 (b) 1800 (c) 36000 (d) 18000
  34. 34.Which is closest to 896 ÷ 31? (a) 60 (b) 30 (c) 300 (d) 15
  35. 35.Round 69.29 to one decimal place. =
  36. 36.Round 89984 to the nearest thousand.
  37. 37.Which is closest to 502 × 28? (Round each number first.) (a) 1500 (b) 15000 (c) 150000 (d) 30000
  38. 38.Which is closest to 600 + 497 + 96? (a) 1200 (b) 1300 (c) 1100 (d) 1400
  39. 39.Round 27.63 to one decimal place. =
  40. 40.Which is closest to 698 + 296 + 895? (a) 1800 (b) 1900 (c) 2000 (d) 2100

Answer key

  1. 63.5
  2. 5300
  3. 44900
  4. 18000
  5. 43700
  6. 64290
  7. 33.1
  8. 72000
  9. 1100
  10. 95.2
  11. 40000
  12. 77800
  13. 1700
  14. 72000
  15. 40
  16. 60
  17. 8530
  18. 2000
  19. 31810
  20. 72000
  21. 70
  22. 2960
  23. 18000
  24. 30
  25. 31.7
  26. 1000
  27. 80
  28. 8000
  29. 61.2
  30. 50100
  31. 24000
  32. 22800
  33. 18000
  34. 30
  35. 69.3
  36. 90000
  37. 15000
  38. 1200
  39. 27.6
  40. 1900

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