← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 21 · 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 80.34 to one decimal place. =
  2. 2.Which is closest to 505 + 603 + 604? (a) 1900 (b) 1600 (c) 1800 (d) 1700
  3. 3.Round 38949 to the nearest ten.
  4. 4.Round 25.69 to one decimal place. =
  5. 5.Which is closest to 1204 ÷ 19? (a) 600 (b) 30 (c) 60 (d) 120
  6. 6.Which is closest to 504 × 31? (Round each number first.) (a) 15000 (b) 150000 (c) 1500 (d) 30000
  7. 7.Which is closest to 902 + 398 + 104? (a) 1500 (b) 1600 (c) 1300 (d) 1400
  8. 8.Which is closest to 501 + 304 + 698? (a) 1600 (b) 1500 (c) 1700 (d) 1400
  9. 9.Round 29438 to the nearest hundred.
  10. 10.Which is closest to 499 + 903 + 600? (a) 2000 (b) 1900 (c) 2200 (d) 2100
  11. 11.Which is closest to 495 + 396 + 800? (a) 1900 (b) 1800 (c) 1600 (d) 1700
  12. 12.Which is closest to 1393 ÷ 19? (a) 700 (b) 140 (c) 70 (d) 35
  13. 13.Round 44.41 to one decimal place. =
  14. 14.Round 61181 to the nearest hundred.
  15. 15.Which is closest to 1005 ÷ 21? (a) 500 (b) 100 (c) 50 (d) 25
  16. 16.Which is closest to 502 × 49? (Round each number first.) (a) 250000 (b) 2500 (c) 50000 (d) 25000
  17. 17.Which is closest to 199 × 49? (Round each number first.) (a) 1000 (b) 100000 (c) 20000 (d) 10000
  18. 18.Round 59040 to the nearest hundred.
  19. 19.Which is closest to 3503 ÷ 49? (a) 140 (b) 70 (c) 35 (d) 700
  20. 20.Which is closest to 797 × 80? (Round each number first.) (a) 128000 (b) 64000 (c) 640000 (d) 6400
  21. 21.Round 93.58 to one decimal place. =
  22. 22.Round 44.43 to one decimal place. =
  23. 23.Which is closest to 797 × 79? (Round each number first.) (a) 6400 (b) 640000 (c) 128000 (d) 64000
  24. 24.Which is closest to 1400 ÷ 19? (a) 700 (b) 140 (c) 35 (d) 70
  25. 25.Which is closest to 2395 ÷ 29? (a) 160 (b) 800 (c) 40 (d) 80
  26. 26.Round 77605 to the nearest thousand.
  27. 27.Which is closest to 1008 ÷ 49? (a) 200 (b) 10 (c) 20 (d) 40
  28. 28.Round 52.74 to one decimal place. =
  29. 29.Round 79.66 to one decimal place. =
  30. 30.Which is closest to 203 + 395 + 500? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  31. 31.Which is closest to 1991 ÷ 49? (a) 80 (b) 400 (c) 40 (d) 20
  32. 32.Which is closest to 897 + 198 + 200? (a) 1300 (b) 1400 (c) 1200 (d) 1500
  33. 33.Round 22.46 to one decimal place. =
  34. 34.Which is closest to 403 ÷ 19? (a) 40 (b) 10 (c) 20 (d) 200
  35. 35.Round 58588 to the nearest ten.
  36. 36.Round 69031 to the nearest thousand.
  37. 37.Which is closest to 791 ÷ 19? (a) 400 (b) 80 (c) 20 (d) 40
  38. 38.Which is closest to 4502 ÷ 49? (a) 90 (b) 900 (c) 45 (d) 180
  39. 39.Round 24.48 to one decimal place. =
  40. 40.Which is closest to 601 + 598 + 899? (a) 2300 (b) 2100 (c) 2200 (d) 2000

Answer key

  1. 80.3
  2. 1700
  3. 38950
  4. 25.7
  5. 60
  6. 15000
  7. 1400
  8. 1500
  9. 29400
  10. 2000
  11. 1700
  12. 70
  13. 44.4
  14. 61200
  15. 50
  16. 25000
  17. 10000
  18. 59000
  19. 70
  20. 64000
  21. 93.6
  22. 44.4
  23. 64000
  24. 70
  25. 80
  26. 78000
  27. 20
  28. 52.7
  29. 79.7
  30. 1100
  31. 40
  32. 1300
  33. 22.5
  34. 20
  35. 58590
  36. 69000
  37. 40
  38. 90
  39. 24.5
  40. 2100

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