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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 388 · 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 795 ÷ 39? (a) 10 (b) 20 (c) 200 (d) 40
  2. 2.Round 85.18 to one decimal place. =
  3. 3.Which is closest to 896 + 900 + 103? (a) 2000 (b) 1800 (c) 1900 (d) 2100
  4. 4.Round 17234 to the nearest thousand.
  5. 5.Which is closest to 1595 ÷ 19? (a) 160 (b) 80 (c) 800 (d) 40
  6. 6.Which is closest to 198 + 200 + 604? (a) 900 (b) 1000 (c) 1200 (d) 1100
  7. 7.Which is closest to 201 × 70? (Round each number first.) (a) 28000 (b) 140000 (c) 1400 (d) 14000
  8. 8.Which is closest to 3999 ÷ 51? (a) 800 (b) 160 (c) 40 (d) 80
  9. 9.Which is closest to 301 × 79? (Round each number first.) (a) 240000 (b) 48000 (c) 2400 (d) 24000
  10. 10.Which is closest to 197 × 70? (Round each number first.) (a) 1400 (b) 28000 (c) 14000 (d) 140000
  11. 11.Round 27480 to the nearest hundred.
  12. 12.Which is closest to 195 + 196 + 598? (a) 1100 (b) 1200 (c) 1000 (d) 900
  13. 13.Round 39.33 to one decimal place. =
  14. 14.Which is closest to 799 × 59? (Round each number first.) (a) 4800 (b) 48000 (c) 480000 (d) 96000
  15. 15.Which is closest to 199 + 598 + 300? (a) 1000 (b) 1200 (c) 1300 (d) 1100
  16. 16.Round 76346 to the nearest thousand.
  17. 17.Which is closest to 202 × 51? (Round each number first.) (a) 10000 (b) 100000 (c) 1000 (d) 20000
  18. 18.Which is closest to 3607 ÷ 41? (a) 900 (b) 180 (c) 45 (d) 90
  19. 19.Round 68779 to the nearest thousand.
  20. 20.Which is closest to 1195 ÷ 21? (a) 600 (b) 60 (c) 30 (d) 120
  21. 21.Which is closest to 904 ÷ 29? (a) 60 (b) 15 (c) 30 (d) 300
  22. 22.Which is closest to 799 × 41? (Round each number first.) (a) 3200 (b) 64000 (c) 320000 (d) 32000
  23. 23.Which is closest to 401 × 82? (Round each number first.) (a) 64000 (b) 32000 (c) 3200 (d) 320000
  24. 24.Which is closest to 198 + 197 + 99? (a) 600 (b) 400 (c) 700 (d) 500
  25. 25.Which is closest to 2009 ÷ 39? (a) 500 (b) 25 (c) 100 (d) 50
  26. 26.Which is closest to 2804 ÷ 39? (a) 35 (b) 70 (c) 140 (d) 700
  27. 27.Which is closest to 501 + 500 + 597? (a) 1500 (b) 1600 (c) 1800 (d) 1700
  28. 28.Which is closest to 1201 ÷ 41? (a) 60 (b) 300 (c) 30 (d) 15
  29. 29.Which is closest to 501 × 19? (Round each number first.) (a) 20000 (b) 1000 (c) 10000 (d) 100000
  30. 30.Which is closest to 303 × 69? (Round each number first.) (a) 21000 (b) 42000 (c) 2100 (d) 210000
  31. 31.Which is closest to 499 × 22? (Round each number first.) (a) 10000 (b) 1000 (c) 100000 (d) 20000
  32. 32.Which is closest to 898 + 701 + 98? (a) 1800 (b) 1600 (c) 1700 (d) 1900
  33. 33.Round 91.49 to one decimal place. =
  34. 34.Which is closest to 2394 ÷ 41? (a) 60 (b) 120 (c) 600 (d) 30
  35. 35.Which is closest to 195 + 598 + 596? (a) 1600 (b) 1400 (c) 1500 (d) 1300
  36. 36.Which is closest to 3007 ÷ 49? (a) 600 (b) 30 (c) 60 (d) 120
  37. 37.Round 66858 to the nearest hundred.
  38. 38.Which is closest to 903 × 58? (Round each number first.) (a) 108000 (b) 54000 (c) 540000 (d) 5400
  39. 39.Which is closest to 399 + 304 + 898? (a) 1600 (b) 1500 (c) 1800 (d) 1700
  40. 40.Which is closest to 392 ÷ 19? (a) 200 (b) 10 (c) 20 (d) 40

Answer key

  1. 20
  2. 85.2
  3. 1900
  4. 17000
  5. 80
  6. 1000
  7. 14000
  8. 80
  9. 24000
  10. 14000
  11. 27500
  12. 1000
  13. 39.3
  14. 48000
  15. 1100
  16. 76000
  17. 10000
  18. 90
  19. 69000
  20. 60
  21. 30
  22. 32000
  23. 32000
  24. 500
  25. 50
  26. 70
  27. 1600
  28. 30
  29. 10000
  30. 21000
  31. 10000
  32. 1700
  33. 91.5
  34. 60
  35. 1400
  36. 60
  37. 66900
  38. 54000
  39. 1600
  40. 20

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