← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 728 · 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 72608 to the nearest hundred.
  2. 2.Round 54.32 to one decimal place. =
  3. 3.Which is closest to 196 × 90? (Round each number first.) (a) 180000 (b) 1800 (c) 18000 (d) 36000
  4. 4.Which is closest to 200 + 896 + 201? (a) 1500 (b) 1400 (c) 1200 (d) 1300
  5. 5.Round 43184 to the nearest ten.
  6. 6.Which is closest to 1502 ÷ 49? (a) 30 (b) 15 (c) 300 (d) 60
  7. 7.Round 92606 to the nearest thousand.
  8. 8.Which is closest to 303 + 705 + 99? (a) 1100 (b) 1000 (c) 1200 (d) 1300
  9. 9.Which is closest to 802 + 302 + 905? (a) 2100 (b) 2200 (c) 1900 (d) 2000
  10. 10.Round 58.83 to one decimal place. =
  11. 11.Round 74441 to the nearest thousand.
  12. 12.Which is closest to 500 × 18? (Round each number first.) (a) 10000 (b) 20000 (c) 1000 (d) 100000
  13. 13.Which is closest to 609 ÷ 21? (a) 15 (b) 30 (c) 60 (d) 300
  14. 14.Round 71.29 to one decimal place. =
  15. 15.Round 92302 to the nearest ten.
  16. 16.Which is closest to 496 + 795 + 105? (a) 1300 (b) 1500 (c) 1400 (d) 1600
  17. 17.Round 26648 to the nearest ten.
  18. 18.Which is closest to 703 × 38? (Round each number first.) (a) 56000 (b) 280000 (c) 28000 (d) 2800
  19. 19.Which is closest to 196 × 20? (Round each number first.) (a) 40000 (b) 400 (c) 8000 (d) 4000
  20. 20.Round 41208 to the nearest hundred.
  21. 21.Which is closest to 200 × 31? (Round each number first.) (a) 6000 (b) 60000 (c) 600 (d) 12000
  22. 22.Round 55.51 to one decimal place. =
  23. 23.Which is closest to 1994 ÷ 39? (a) 50 (b) 25 (c) 500 (d) 100
  24. 24.Round 8934 to the nearest hundred.
  25. 25.Round 39621 to the nearest thousand.
  26. 26.Which is closest to 698 × 58? (Round each number first.) (a) 420000 (b) 42000 (c) 84000 (d) 4200
  27. 27.Round 16.18 to one decimal place. =
  28. 28.Which is closest to 796 × 70? (Round each number first.) (a) 5600 (b) 560000 (c) 112000 (d) 56000
  29. 29.Round 37.84 to one decimal place. =
  30. 30.Which is closest to 199 + 696 + 704? (a) 1500 (b) 1800 (c) 1600 (d) 1700
  31. 31.Which is closest to 403 + 299 + 602? (a) 1200 (b) 1500 (c) 1400 (d) 1300
  32. 32.Round 89.51 to one decimal place. =
  33. 33.Which is closest to 601 ÷ 21? (a) 15 (b) 300 (c) 60 (d) 30
  34. 34.Which is closest to 899 + 402 + 696? (a) 2000 (b) 2100 (c) 1900 (d) 2200
  35. 35.Round 26243 to the nearest thousand.
  36. 36.Round 15.84 to one decimal place. =
  37. 37.Which is closest to 2395 ÷ 29? (a) 80 (b) 160 (c) 800 (d) 40
  38. 38.Round 77.77 to one decimal place. =
  39. 39.Which is closest to 900 × 89? (Round each number first.) (a) 162000 (b) 8100 (c) 810000 (d) 81000
  40. 40.Round 84.32 to one decimal place. =

Answer key

  1. 72600
  2. 54.3
  3. 18000
  4. 1300
  5. 43180
  6. 30
  7. 93000
  8. 1100
  9. 2000
  10. 58.8
  11. 74000
  12. 10000
  13. 30
  14. 71.3
  15. 92300
  16. 1400
  17. 26650
  18. 28000
  19. 4000
  20. 41200
  21. 6000
  22. 55.5
  23. 50
  24. 8900
  25. 40000
  26. 42000
  27. 16.2
  28. 56000
  29. 37.8
  30. 1600
  31. 1300
  32. 89.5
  33. 30
  34. 2000
  35. 26000
  36. 15.8
  37. 80
  38. 77.8
  39. 81000
  40. 84.3

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