← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 112 · 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 498 + 105 + 903? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  2. 2.Round 75.77 to one decimal place. =
  3. 3.Which is closest to 504 × 49? (Round each number first.) (a) 2500 (b) 250000 (c) 50000 (d) 25000
  4. 4.Which is closest to 901 + 603 + 603? (a) 2100 (b) 2300 (c) 2200 (d) 2000
  5. 5.Which is closest to 798 + 103 + 397? (a) 1400 (b) 1200 (c) 1500 (d) 1300
  6. 6.Which is closest to 604 ÷ 29? (a) 40 (b) 200 (c) 20 (d) 10
  7. 7.Round 96.58 to one decimal place. =
  8. 8.Round 50.56 to one decimal place. =
  9. 9.Round 48317 to the nearest hundred.
  10. 10.Which is closest to 401 × 49? (Round each number first.) (a) 40000 (b) 20000 (c) 200000 (d) 2000
  11. 11.Which is closest to 796 × 58? (Round each number first.) (a) 480000 (b) 48000 (c) 96000 (d) 4800
  12. 12.Round 74.86 to one decimal place. =
  13. 13.Which is closest to 604 + 797 + 199? (a) 1800 (b) 1600 (c) 1700 (d) 1500
  14. 14.Which is closest to 1494 ÷ 31? (a) 25 (b) 100 (c) 50 (d) 500
  15. 15.Round 77957 to the nearest thousand.
  16. 16.Round 66.09 to one decimal place. =
  17. 17.Which is closest to 297 × 20? (Round each number first.) (a) 600 (b) 6000 (c) 60000 (d) 12000
  18. 18.Which is closest to 1007 ÷ 21? (a) 500 (b) 25 (c) 100 (d) 50
  19. 19.Round 59.57 to one decimal place. =
  20. 20.Which is closest to 1805 ÷ 19? (a) 180 (b) 90 (c) 45 (d) 900
  21. 21.Which is closest to 1804 ÷ 31? (a) 600 (b) 30 (c) 60 (d) 120
  22. 22.Which is closest to 602 ÷ 19? (a) 300 (b) 60 (c) 15 (d) 30
  23. 23.Which is closest to 2405 ÷ 41? (a) 30 (b) 60 (c) 600 (d) 120
  24. 24.Which is closest to 499 × 52? (Round each number first.) (a) 250000 (b) 25000 (c) 50000 (d) 2500
  25. 25.Round 21021 to the nearest thousand.
  26. 26.Round 50.38 to one decimal place. =
  27. 27.Round 23516 to the nearest hundred.
  28. 28.Which is closest to 195 + 699 + 695? (a) 1800 (b) 1700 (c) 1600 (d) 1500
  29. 29.Round 11267 to the nearest thousand.
  30. 30.Which is closest to 97 + 101 + 898? (a) 1100 (b) 1000 (c) 1200 (d) 1300
  31. 31.Round 48.69 to one decimal place. =
  32. 32.Round 15.67 to one decimal place. =
  33. 33.Round 45.86 to one decimal place. =
  34. 34.Which is closest to 200 × 81? (Round each number first.) (a) 160000 (b) 16000 (c) 32000 (d) 1600
  35. 35.Round 46111 to the nearest hundred.
  36. 36.Which is closest to 396 + 496 + 601? (a) 1700 (b) 1400 (c) 1500 (d) 1600
  37. 37.Round 25.27 to one decimal place. =
  38. 38.Which is closest to 196 + 701 + 97? (a) 1000 (b) 900 (c) 1200 (d) 1100
  39. 39.Which is closest to 1007 ÷ 19? (a) 500 (b) 25 (c) 100 (d) 50
  40. 40.Round 37.42 to one decimal place. =

Answer key

  1. 1500
  2. 75.8
  3. 25000
  4. 2100
  5. 1300
  6. 20
  7. 96.6
  8. 50.6
  9. 48300
  10. 20000
  11. 48000
  12. 74.9
  13. 1600
  14. 50
  15. 78000
  16. 66.1
  17. 6000
  18. 50
  19. 59.6
  20. 90
  21. 60
  22. 30
  23. 60
  24. 25000
  25. 21000
  26. 50.4
  27. 23500
  28. 1600
  29. 11000
  30. 1100
  31. 48.7
  32. 15.7
  33. 45.9
  34. 16000
  35. 46100
  36. 1500
  37. 25.3
  38. 1000
  39. 50
  40. 37.4

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