← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 532 · 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 93.68 to one decimal place. =
  2. 2.Round 76.18 to one decimal place. =
  3. 3.Round 98.49 to one decimal place. =
  4. 4.Which is closest to 199 × 91? (Round each number first.) (a) 36000 (b) 1800 (c) 180000 (d) 18000
  5. 5.Round 57.48 to one decimal place. =
  6. 6.Which is closest to 498 × 71? (Round each number first.) (a) 3500 (b) 35000 (c) 70000 (d) 350000
  7. 7.Which is closest to 799 × 78? (Round each number first.) (a) 6400 (b) 128000 (c) 64000 (d) 640000
  8. 8.Which is closest to 1605 ÷ 21? (a) 160 (b) 40 (c) 800 (d) 80
  9. 9.Which is closest to 1499 ÷ 51? (a) 300 (b) 60 (c) 15 (d) 30
  10. 10.Round 96198 to the nearest hundred.
  11. 11.Which is closest to 297 × 58? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  12. 12.Which is closest to 197 × 88? (Round each number first.) (a) 36000 (b) 1800 (c) 18000 (d) 180000
  13. 13.Which is closest to 897 × 38? (Round each number first.) (a) 360000 (b) 3600 (c) 36000 (d) 72000
  14. 14.Round 39955 to the nearest hundred.
  15. 15.Round 29.83 to one decimal place. =
  16. 16.Which is closest to 303 + 104 + 596? (a) 900 (b) 1200 (c) 1100 (d) 1000
  17. 17.Which is closest to 1506 ÷ 29? (a) 500 (b) 25 (c) 100 (d) 50
  18. 18.Round 10945 to the nearest thousand.
  19. 19.Round 90687 to the nearest hundred.
  20. 20.Which is closest to 1395 ÷ 19? (a) 700 (b) 35 (c) 70 (d) 140
  21. 21.Which is closest to 2408 ÷ 39? (a) 600 (b) 60 (c) 120 (d) 30
  22. 22.Which is closest to 609 ÷ 19? (a) 60 (b) 300 (c) 30 (d) 15
  23. 23.Which is closest to 398 + 296 + 701? (a) 1500 (b) 1600 (c) 1400 (d) 1300
  24. 24.Which is closest to 302 × 48? (Round each number first.) (a) 30000 (b) 150000 (c) 15000 (d) 1500
  25. 25.Round 53302 to the nearest thousand.
  26. 26.Which is closest to 297 × 28? (Round each number first.) (a) 18000 (b) 90000 (c) 9000 (d) 900
  27. 27.Which is closest to 602 × 30? (Round each number first.) (a) 18000 (b) 36000 (c) 1800 (d) 180000
  28. 28.Round 62.86 to one decimal place. =
  29. 29.Round 80.21 to one decimal place. =
  30. 30.Which is closest to 600 + 896 + 205? (a) 1600 (b) 1700 (c) 1800 (d) 1900
  31. 31.Round 21.22 to one decimal place. =
  32. 32.Round 36.32 to one decimal place. =
  33. 33.Which is closest to 302 × 30? (Round each number first.) (a) 9000 (b) 18000 (c) 900 (d) 90000
  34. 34.Which is closest to 697 + 799 + 805? (a) 2400 (b) 2300 (c) 2500 (d) 2200
  35. 35.Which is closest to 504 × 30? (Round each number first.) (a) 30000 (b) 15000 (c) 1500 (d) 150000
  36. 36.Round 65.42 to one decimal place. =
  37. 37.Which is closest to 404 × 81? (Round each number first.) (a) 32000 (b) 320000 (c) 3200 (d) 64000
  38. 38.Which is closest to 400 + 696 + 498? (a) 1800 (b) 1600 (c) 1500 (d) 1700
  39. 39.Which is closest to 1504 ÷ 29? (a) 500 (b) 25 (c) 50 (d) 100
  40. 40.Round 94036 to the nearest thousand.

Answer key

  1. 93.7
  2. 76.2
  3. 98.5
  4. 18000
  5. 57.5
  6. 35000
  7. 64000
  8. 80
  9. 30
  10. 96200
  11. 18000
  12. 18000
  13. 36000
  14. 40000
  15. 29.8
  16. 1000
  17. 50
  18. 11000
  19. 90700
  20. 70
  21. 60
  22. 30
  23. 1400
  24. 15000
  25. 53000
  26. 9000
  27. 18000
  28. 62.9
  29. 80.2
  30. 1700
  31. 21.2
  32. 36.3
  33. 9000
  34. 2300
  35. 15000
  36. 65.4
  37. 32000
  38. 1600
  39. 50
  40. 94000

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