← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 818 · 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 899 × 21? (Round each number first.) (a) 1800 (b) 36000 (c) 18000 (d) 180000
  2. 2.Round 41.34 to one decimal place. =
  3. 3.Which is closest to 702 + 297 + 95? (a) 1000 (b) 1300 (c) 1100 (d) 1200
  4. 4.Round 80149 to the nearest ten.
  5. 5.Round 30943 to the nearest thousand.
  6. 6.Round 77754 to the nearest thousand.
  7. 7.Round 31.49 to one decimal place. =
  8. 8.Round 96472 to the nearest hundred.
  9. 9.Which is closest to 698 + 305 + 601? (a) 1800 (b) 1700 (c) 1500 (d) 1600
  10. 10.Which is closest to 798 × 38? (Round each number first.) (a) 64000 (b) 3200 (c) 320000 (d) 32000
  11. 11.Which is closest to 196 × 30? (Round each number first.) (a) 600 (b) 60000 (c) 12000 (d) 6000
  12. 12.Round 34474 to the nearest ten.
  13. 13.Which is closest to 800 × 88? (Round each number first.) (a) 72000 (b) 720000 (c) 7200 (d) 144000
  14. 14.Round 7420 to the nearest thousand.
  15. 15.Round 85.23 to one decimal place. =
  16. 16.Round 14879 to the nearest thousand.
  17. 17.Which is closest to 501 × 39? (Round each number first.) (a) 200000 (b) 2000 (c) 40000 (d) 20000
  18. 18.Round 60.43 to one decimal place. =
  19. 19.Round 48352 to the nearest ten.
  20. 20.Which is closest to 903 × 39? (Round each number first.) (a) 36000 (b) 360000 (c) 72000 (d) 3600
  21. 21.Which is closest to 3601 ÷ 41? (a) 90 (b) 900 (c) 180 (d) 45
  22. 22.Which is closest to 904 × 71? (Round each number first.) (a) 6300 (b) 126000 (c) 63000 (d) 630000
  23. 23.Round 22.58 to one decimal place. =
  24. 24.Which is closest to 96 + 298 + 903? (a) 1500 (b) 1200 (c) 1400 (d) 1300
  25. 25.Which is closest to 993 ÷ 49? (a) 200 (b) 20 (c) 10 (d) 40
  26. 26.Which is closest to 1591 ÷ 19? (a) 80 (b) 40 (c) 160 (d) 800
  27. 27.Round 87.11 to one decimal place. =
  28. 28.Round 45644 to the nearest thousand.
  29. 29.Round 54.16 to one decimal place. =
  30. 30.Which is closest to 596 + 804 + 302? (a) 1600 (b) 1800 (c) 1900 (d) 1700
  31. 31.Which is closest to 1796 ÷ 19? (a) 90 (b) 180 (c) 900 (d) 45
  32. 32.Which is closest to 1494 ÷ 49? (a) 60 (b) 300 (c) 15 (d) 30
  33. 33.Round 56081 to the nearest ten.
  34. 34.Which is closest to 802 × 92? (Round each number first.) (a) 72000 (b) 7200 (c) 144000 (d) 720000
  35. 35.Which is closest to 303 × 62? (Round each number first.) (a) 36000 (b) 180000 (c) 18000 (d) 1800
  36. 36.Round 45.31 to one decimal place. =
  37. 37.Round 5022 to the nearest ten.
  38. 38.Round 98.72 to one decimal place. =
  39. 39.Round 5503 to the nearest thousand.
  40. 40.Which is closest to 1399 ÷ 19? (a) 700 (b) 140 (c) 35 (d) 70

Answer key

  1. 18000
  2. 41.3
  3. 1100
  4. 80150
  5. 31000
  6. 78000
  7. 31.5
  8. 96500
  9. 1600
  10. 32000
  11. 6000
  12. 34470
  13. 72000
  14. 7000
  15. 85.2
  16. 15000
  17. 20000
  18. 60.4
  19. 48350
  20. 36000
  21. 90
  22. 63000
  23. 22.6
  24. 1300
  25. 20
  26. 80
  27. 87.1
  28. 46000
  29. 54.2
  30. 1700
  31. 90
  32. 30
  33. 56080
  34. 72000
  35. 18000
  36. 45.3
  37. 5020
  38. 98.7
  39. 6000
  40. 70

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