← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 730 · 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 71234 to the nearest ten.
  2. 2.Which is closest to 596 + 305 + 800? (a) 1600 (b) 1700 (c) 1800 (d) 1900
  3. 3.Which is closest to 2007 ÷ 39? (a) 25 (b) 100 (c) 500 (d) 50
  4. 4.Which is closest to 1204 ÷ 21? (a) 60 (b) 30 (c) 120 (d) 600
  5. 5.Which is closest to 1599 ÷ 19? (a) 160 (b) 800 (c) 40 (d) 80
  6. 6.Round 40987 to the nearest ten.
  7. 7.Round 30.06 to one decimal place. =
  8. 8.Which is closest to 798 + 195 + 805? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  9. 9.Which is closest to 502 + 698 + 502? (a) 1900 (b) 1700 (c) 1600 (d) 1800
  10. 10.Which is closest to 1395 ÷ 19? (a) 700 (b) 140 (c) 35 (d) 70
  11. 11.Which is closest to 498 × 32? (Round each number first.) (a) 150000 (b) 1500 (c) 15000 (d) 30000
  12. 12.Which is closest to 794 ÷ 39? (a) 10 (b) 40 (c) 200 (d) 20
  13. 13.Which is closest to 495 + 597 + 197? (a) 1400 (b) 1500 (c) 1300 (d) 1200
  14. 14.Which is closest to 496 × 29? (Round each number first.) (a) 15000 (b) 30000 (c) 150000 (d) 1500
  15. 15.Which is closest to 2103 ÷ 29? (a) 700 (b) 35 (c) 140 (d) 70
  16. 16.Which is closest to 798 + 302 + 103? (a) 1100 (b) 1400 (c) 1200 (d) 1300
  17. 17.Which is closest to 2100 ÷ 31? (a) 700 (b) 140 (c) 35 (d) 70
  18. 18.Round 93567 to the nearest ten.
  19. 19.Round 11.24 to one decimal place. =
  20. 20.Round 22965 to the nearest thousand.
  21. 21.Round 2804 to the nearest hundred.
  22. 22.Round 30914 to the nearest ten.
  23. 23.Which is closest to 195 + 504 + 896? (a) 1800 (b) 1600 (c) 1700 (d) 1500
  24. 24.Round 59.53 to one decimal place. =
  25. 25.Which is closest to 2698 ÷ 29? (a) 900 (b) 90 (c) 45 (d) 180
  26. 26.Which is closest to 2001 ÷ 39? (a) 100 (b) 25 (c) 500 (d) 50
  27. 27.Which is closest to 601 ÷ 29? (a) 40 (b) 10 (c) 200 (d) 20
  28. 28.Round 48.51 to one decimal place. =
  29. 29.Round 28042 to the nearest hundred.
  30. 30.Which is closest to 399 ÷ 19? (a) 20 (b) 10 (c) 40 (d) 200
  31. 31.Which is closest to 597 × 69? (Round each number first.) (a) 4200 (b) 42000 (c) 84000 (d) 420000
  32. 32.Which is closest to 802 × 78? (Round each number first.) (a) 640000 (b) 64000 (c) 128000 (d) 6400
  33. 33.Which is closest to 603 × 41? (Round each number first.) (a) 240000 (b) 24000 (c) 2400 (d) 48000
  34. 34.Which is closest to 301 × 52? (Round each number first.) (a) 30000 (b) 15000 (c) 1500 (d) 150000
  35. 35.Round 25.62 to one decimal place. =
  36. 36.Which is closest to 2707 ÷ 29? (a) 900 (b) 45 (c) 90 (d) 180
  37. 37.Which is closest to 601 × 20? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  38. 38.Which is closest to 804 + 899 + 502? (a) 2400 (b) 2300 (c) 2200 (d) 2100
  39. 39.Which is closest to 904 × 42? (Round each number first.) (a) 72000 (b) 360000 (c) 36000 (d) 3600
  40. 40.Which is closest to 396 × 91? (Round each number first.) (a) 36000 (b) 72000 (c) 360000 (d) 3600

Answer key

  1. 71230
  2. 1700
  3. 50
  4. 60
  5. 80
  6. 40990
  7. 30.1
  8. 1800
  9. 1700
  10. 70
  11. 15000
  12. 20
  13. 1300
  14. 15000
  15. 70
  16. 1200
  17. 70
  18. 93570
  19. 11.2
  20. 23000
  21. 2800
  22. 30910
  23. 1600
  24. 59.5
  25. 90
  26. 50
  27. 20
  28. 48.5
  29. 28000
  30. 20
  31. 42000
  32. 64000
  33. 24000
  34. 15000
  35. 25.6
  36. 90
  37. 12000
  38. 2200
  39. 36000
  40. 36000

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