← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 743 · 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 505 + 597 + 504? (a) 1600 (b) 1700 (c) 1800 (d) 1500
  2. 2.Round 61.12 to one decimal place. =
  3. 3.Which is closest to 697 + 605 + 899? (a) 2400 (b) 2100 (c) 2200 (d) 2300
  4. 4.Round 28.71 to one decimal place. =
  5. 5.Round 91.84 to one decimal place. =
  6. 6.Which is closest to 797 + 505 + 805? (a) 2100 (b) 2000 (c) 2200 (d) 2300
  7. 7.Which is closest to 793 ÷ 19? (a) 40 (b) 80 (c) 20 (d) 400
  8. 8.Which is closest to 497 + 803 + 304? (a) 1600 (b) 1700 (c) 1800 (d) 1500
  9. 9.Which is closest to 996 ÷ 19? (a) 500 (b) 100 (c) 25 (d) 50
  10. 10.Round 21451 to the nearest thousand.
  11. 11.Which is closest to 796 × 88? (Round each number first.) (a) 7200 (b) 72000 (c) 720000 (d) 144000
  12. 12.Which is closest to 1606 ÷ 19? (a) 160 (b) 80 (c) 800 (d) 40
  13. 13.Which is closest to 3493 ÷ 51? (a) 700 (b) 70 (c) 140 (d) 35
  14. 14.Which is closest to 800 ÷ 41? (a) 40 (b) 10 (c) 20 (d) 200
  15. 15.Round 10.67 to one decimal place. =
  16. 16.Which is closest to 100 + 805 + 705? (a) 1700 (b) 1800 (c) 1500 (d) 1600
  17. 17.Which is closest to 3204 ÷ 41? (a) 160 (b) 80 (c) 40 (d) 800
  18. 18.Which is closest to 903 × 32? (Round each number first.) (a) 27000 (b) 2700 (c) 54000 (d) 270000
  19. 19.Which is closest to 699 + 600 + 502? (a) 1700 (b) 1800 (c) 1900 (d) 2000
  20. 20.Round 56.69 to one decimal place. =
  21. 21.Round 2157 to the nearest thousand.
  22. 22.Round 25.64 to one decimal place. =
  23. 23.Which is closest to 902 × 50? (Round each number first.) (a) 450000 (b) 90000 (c) 4500 (d) 45000
  24. 24.Which is closest to 500 × 78? (Round each number first.) (a) 4000 (b) 40000 (c) 400000 (d) 80000
  25. 25.Which is closest to 608 ÷ 19? (a) 15 (b) 300 (c) 30 (d) 60
  26. 26.Which is closest to 796 ÷ 21? (a) 40 (b) 400 (c) 20 (d) 80
  27. 27.Round 25.78 to one decimal place. =
  28. 28.Which is closest to 803 × 71? (Round each number first.) (a) 560000 (b) 56000 (c) 112000 (d) 5600
  29. 29.Round 8318 to the nearest thousand.
  30. 30.Which is closest to 404 × 51? (Round each number first.) (a) 20000 (b) 200000 (c) 40000 (d) 2000
  31. 31.Which is closest to 203 × 61? (Round each number first.) (a) 24000 (b) 12000 (c) 1200 (d) 120000
  32. 32.Which is closest to 103 + 99 + 201? (a) 600 (b) 300 (c) 500 (d) 400
  33. 33.Which is closest to 2101 ÷ 29? (a) 35 (b) 70 (c) 140 (d) 700
  34. 34.Which is closest to 703 × 21? (Round each number first.) (a) 14000 (b) 1400 (c) 140000 (d) 28000
  35. 35.Round 19871 to the nearest hundred.
  36. 36.Which is closest to 1805 ÷ 21? (a) 900 (b) 90 (c) 180 (d) 45
  37. 37.Which is closest to 2995 ÷ 51? (a) 600 (b) 60 (c) 30 (d) 120
  38. 38.Which is closest to 705 + 395 + 603? (a) 1600 (b) 1800 (c) 1700 (d) 1900
  39. 39.Round 77030 to the nearest hundred.
  40. 40.Which is closest to 2002 ÷ 51? (a) 80 (b) 400 (c) 40 (d) 20

Answer key

  1. 1600
  2. 61.1
  3. 2200
  4. 28.7
  5. 91.8
  6. 2100
  7. 40
  8. 1600
  9. 50
  10. 21000
  11. 72000
  12. 80
  13. 70
  14. 20
  15. 10.7
  16. 1600
  17. 80
  18. 27000
  19. 1800
  20. 56.7
  21. 2000
  22. 25.6
  23. 45000
  24. 40000
  25. 30
  26. 40
  27. 25.8
  28. 56000
  29. 8000
  30. 20000
  31. 12000
  32. 400
  33. 70
  34. 14000
  35. 19900
  36. 90
  37. 60
  38. 1700
  39. 77000
  40. 40

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