← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 584 · 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 196 + 904 + 95? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  2. 2.Which is closest to 399 × 88? (Round each number first.) (a) 36000 (b) 3600 (c) 360000 (d) 72000
  3. 3.Which is closest to 1206 ÷ 39? (a) 300 (b) 30 (c) 60 (d) 15
  4. 4.Which is closest to 2803 ÷ 39? (a) 700 (b) 140 (c) 35 (d) 70
  5. 5.Which is closest to 1007 ÷ 51? (a) 200 (b) 20 (c) 40 (d) 10
  6. 6.Which is closest to 201 + 895 + 896? (a) 1900 (b) 2200 (c) 2000 (d) 2100
  7. 7.Round 45.29 to one decimal place. =
  8. 8.Which is closest to 1594 ÷ 21? (a) 80 (b) 40 (c) 160 (d) 800
  9. 9.Which is closest to 404 + 300 + 603? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  10. 10.Which is closest to 4506 ÷ 49? (a) 900 (b) 45 (c) 180 (d) 90
  11. 11.Round 91684 to the nearest thousand.
  12. 12.Round 26570 to the nearest hundred.
  13. 13.Which is closest to 2495 ÷ 49? (a) 100 (b) 25 (c) 50 (d) 500
  14. 14.Which is closest to 298 × 69? (Round each number first.) (a) 42000 (b) 210000 (c) 2100 (d) 21000
  15. 15.Which is closest to 598 × 39? (Round each number first.) (a) 240000 (b) 2400 (c) 48000 (d) 24000
  16. 16.Round 85.49 to one decimal place. =
  17. 17.Which is closest to 607 ÷ 29? (a) 40 (b) 20 (c) 10 (d) 200
  18. 18.Round 83.71 to one decimal place. =
  19. 19.Which is closest to 701 + 902 + 501? (a) 2000 (b) 2200 (c) 2100 (d) 2300
  20. 20.Which is closest to 403 × 68? (Round each number first.) (a) 2800 (b) 56000 (c) 28000 (d) 280000
  21. 21.Round 83066 to the nearest thousand.
  22. 22.Which is closest to 902 × 78? (Round each number first.) (a) 720000 (b) 7200 (c) 144000 (d) 72000
  23. 23.Which is closest to 803 × 40? (Round each number first.) (a) 32000 (b) 320000 (c) 3200 (d) 64000
  24. 24.Which is closest to 2397 ÷ 39? (a) 60 (b) 600 (c) 30 (d) 120
  25. 25.Round 72.11 to one decimal place. =
  26. 26.Round 79.12 to one decimal place. =
  27. 27.Which is closest to 202 + 505 + 900? (a) 1700 (b) 1500 (c) 1800 (d) 1600
  28. 28.Round 79.29 to one decimal place. =
  29. 29.Round 91694 to the nearest ten.
  30. 30.Which is closest to 991 ÷ 19? (a) 500 (b) 100 (c) 50 (d) 25
  31. 31.Which is closest to 800 + 101 + 903? (a) 1800 (b) 1900 (c) 2000 (d) 1700
  32. 32.Round 44477 to the nearest thousand.
  33. 33.Round 56.37 to one decimal place. =
  34. 34.Which is closest to 404 × 18? (Round each number first.) (a) 80000 (b) 800 (c) 8000 (d) 16000
  35. 35.Round 40841 to the nearest thousand.
  36. 36.Which is closest to 2500 ÷ 51? (a) 500 (b) 50 (c) 25 (d) 100
  37. 37.Which is closest to 299 × 32? (Round each number first.) (a) 18000 (b) 9000 (c) 900 (d) 90000
  38. 38.Round 15.14 to one decimal place. =
  39. 39.Round 67.24 to one decimal place. =
  40. 40.Which is closest to 899 + 601 + 802? (a) 2300 (b) 2500 (c) 2200 (d) 2400

Answer key

  1. 1200
  2. 36000
  3. 30
  4. 70
  5. 20
  6. 2000
  7. 45.3
  8. 80
  9. 1300
  10. 90
  11. 92000
  12. 26600
  13. 50
  14. 21000
  15. 24000
  16. 85.5
  17. 20
  18. 83.7
  19. 2100
  20. 28000
  21. 83000
  22. 72000
  23. 32000
  24. 60
  25. 72.1
  26. 79.1
  27. 1600
  28. 79.3
  29. 91690
  30. 50
  31. 1800
  32. 44000
  33. 56.4
  34. 8000
  35. 41000
  36. 50
  37. 9000
  38. 15.1
  39. 67.2
  40. 2300

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