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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 451 · 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 2094 ÷ 31? (a) 700 (b) 35 (c) 140 (d) 70
  2. 2.Which is closest to 99 + 697 + 195? (a) 900 (b) 1200 (c) 1100 (d) 1000
  3. 3.Which is closest to 798 + 900 + 600? (a) 2400 (b) 2200 (c) 2500 (d) 2300
  4. 4.Which is closest to 802 + 298 + 598? (a) 1900 (b) 1600 (c) 1700 (d) 1800
  5. 5.Which is closest to 1405 ÷ 19? (a) 35 (b) 140 (c) 70 (d) 700
  6. 6.Which is closest to 901 × 40? (Round each number first.) (a) 36000 (b) 72000 (c) 360000 (d) 3600
  7. 7.Which is closest to 1595 ÷ 21? (a) 40 (b) 800 (c) 80 (d) 160
  8. 8.Which is closest to 203 + 702 + 104? (a) 1100 (b) 1200 (c) 1000 (d) 900
  9. 9.Which is closest to 2702 ÷ 31? (a) 180 (b) 900 (c) 45 (d) 90
  10. 10.Round 41.13 to one decimal place. =
  11. 11.Which is closest to 301 + 300 + 697? (a) 1400 (b) 1300 (c) 1200 (d) 1500
  12. 12.Round 50.83 to one decimal place. =
  13. 13.Which is closest to 97 + 397 + 605? (a) 1300 (b) 1200 (c) 1100 (d) 1000
  14. 14.Which is closest to 600 × 51? (Round each number first.) (a) 60000 (b) 30000 (c) 3000 (d) 300000
  15. 15.Which is closest to 1194 ÷ 29? (a) 80 (b) 400 (c) 20 (d) 40
  16. 16.Round 26.76 to one decimal place. =
  17. 17.Which is closest to 593 ÷ 31? (a) 200 (b) 20 (c) 10 (d) 40
  18. 18.Round 79.38 to one decimal place. =
  19. 19.Which is closest to 301 × 38? (Round each number first.) (a) 1200 (b) 120000 (c) 24000 (d) 12000
  20. 20.Round 37.41 to one decimal place. =
  21. 21.Which is closest to 608 ÷ 21? (a) 15 (b) 60 (c) 30 (d) 300
  22. 22.Which is closest to 898 + 804 + 595? (a) 2400 (b) 2500 (c) 2300 (d) 2200
  23. 23.Round 4253 to the nearest ten.
  24. 24.Which is closest to 697 + 395 + 98? (a) 1300 (b) 1100 (c) 1400 (d) 1200
  25. 25.Round 41.18 to one decimal place. =
  26. 26.Which is closest to 600 × 19? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
  27. 27.Which is closest to 1807 ÷ 19? (a) 180 (b) 900 (c) 90 (d) 45
  28. 28.Which is closest to 703 + 802 + 402? (a) 2000 (b) 1900 (c) 1800 (d) 2100
  29. 29.Which is closest to 697 + 498 + 402? (a) 1600 (b) 1700 (c) 1800 (d) 1500
  30. 30.Which is closest to 797 × 20? (Round each number first.) (a) 160000 (b) 32000 (c) 16000 (d) 1600
  31. 31.Round 17.61 to one decimal place. =
  32. 32.Which is closest to 696 × 88? (Round each number first.) (a) 6300 (b) 630000 (c) 126000 (d) 63000
  33. 33.Which is closest to 701 × 28? (Round each number first.) (a) 42000 (b) 2100 (c) 21000 (d) 210000
  34. 34.Round 45.86 to one decimal place. =
  35. 35.Round 13.86 to one decimal place. =
  36. 36.Which is closest to 201 + 796 + 696? (a) 1800 (b) 1600 (c) 1900 (d) 1700
  37. 37.Which is closest to 804 + 496 + 99? (a) 1400 (b) 1600 (c) 1500 (d) 1300
  38. 38.Round 94912 to the nearest hundred.
  39. 39.Which is closest to 604 × 81? (Round each number first.) (a) 480000 (b) 4800 (c) 96000 (d) 48000
  40. 40.Which is closest to 302 + 904 + 801? (a) 2100 (b) 1900 (c) 2000 (d) 2200

Answer key

  1. 70
  2. 1000
  3. 2300
  4. 1700
  5. 70
  6. 36000
  7. 80
  8. 1000
  9. 90
  10. 41.1
  11. 1300
  12. 50.8
  13. 1100
  14. 30000
  15. 40
  16. 26.8
  17. 20
  18. 79.4
  19. 12000
  20. 37.4
  21. 30
  22. 2300
  23. 4250
  24. 1200
  25. 41.2
  26. 12000
  27. 90
  28. 1900
  29. 1600
  30. 16000
  31. 17.6
  32. 63000
  33. 21000
  34. 45.9
  35. 13.9
  36. 1700
  37. 1400
  38. 94900
  39. 48000
  40. 2000

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