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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 449 · 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 893 ÷ 31? (a) 60 (b) 15 (c) 30 (d) 300
  2. 2.Which is closest to 898 × 72? (Round each number first.) (a) 126000 (b) 6300 (c) 630000 (d) 63000
  3. 3.Round 78761 to the nearest hundred.
  4. 4.Which is closest to 1600 ÷ 39? (a) 40 (b) 400 (c) 20 (d) 80
  5. 5.Which is closest to 1503 ÷ 31? (a) 25 (b) 100 (c) 50 (d) 500
  6. 6.Round 35.88 to one decimal place. =
  7. 7.Which is closest to 1804 ÷ 31? (a) 600 (b) 30 (c) 60 (d) 120
  8. 8.Which is closest to 500 + 300 + 299? (a) 1100 (b) 1000 (c) 1200 (d) 1300
  9. 9.Round 41863 to the nearest thousand.
  10. 10.Which is closest to 1509 ÷ 31? (a) 500 (b) 50 (c) 25 (d) 100
  11. 11.Which is closest to 1194 ÷ 19? (a) 30 (b) 60 (c) 600 (d) 120
  12. 12.Which is closest to 199 × 61? (Round each number first.) (a) 1200 (b) 24000 (c) 120000 (d) 12000
  13. 13.Which is closest to 895 + 298 + 197? (a) 1400 (b) 1500 (c) 1300 (d) 1600
  14. 14.Which is closest to 504 + 102 + 295? (a) 900 (b) 1000 (c) 1100 (d) 800
  15. 15.Which is closest to 802 × 70? (Round each number first.) (a) 56000 (b) 5600 (c) 560000 (d) 112000
  16. 16.Round 97.86 to one decimal place. =
  17. 17.Which is closest to 199 + 796 + 795? (a) 1800 (b) 2000 (c) 1900 (d) 1700
  18. 18.Which is closest to 602 × 29? (Round each number first.) (a) 1800 (b) 18000 (c) 180000 (d) 36000
  19. 19.Which is closest to 3202 ÷ 39? (a) 800 (b) 160 (c) 80 (d) 40
  20. 20.Which is closest to 899 × 29? (Round each number first.) (a) 54000 (b) 27000 (c) 2700 (d) 270000
  21. 21.Round 53397 to the nearest thousand.
  22. 22.Which is closest to 2702 ÷ 29? (a) 900 (b) 90 (c) 45 (d) 180
  23. 23.Round 33437 to the nearest hundred.
  24. 24.Which is closest to 204 × 21? (Round each number first.) (a) 8000 (b) 400 (c) 4000 (d) 40000
  25. 25.Round 45.13 to one decimal place. =
  26. 26.Which is closest to 4000 ÷ 49? (a) 40 (b) 160 (c) 800 (d) 80
  27. 27.Which is closest to 397 + 904 + 195? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  28. 28.Which is closest to 302 × 59? (Round each number first.) (a) 36000 (b) 18000 (c) 1800 (d) 180000
  29. 29.Round 85572 to the nearest hundred.
  30. 30.Round 20687 to the nearest thousand.
  31. 31.Which is closest to 197 × 88? (Round each number first.) (a) 1800 (b) 18000 (c) 36000 (d) 180000
  32. 32.Which is closest to 1199 ÷ 19? (a) 120 (b) 30 (c) 600 (d) 60
  33. 33.Which is closest to 596 × 42? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
  34. 34.Round 73.67 to one decimal place. =
  35. 35.Round 62202 to the nearest ten.
  36. 36.Which is closest to 804 + 797 + 497? (a) 2100 (b) 2200 (c) 2000 (d) 2300
  37. 37.Round 29268 to the nearest thousand.
  38. 38.Which is closest to 404 × 48? (Round each number first.) (a) 20000 (b) 200000 (c) 2000 (d) 40000
  39. 39.Which is closest to 102 + 395 + 496? (a) 1100 (b) 900 (c) 1000 (d) 1200
  40. 40.Round 7330 to the nearest thousand.

Answer key

  1. 30
  2. 63000
  3. 78800
  4. 40
  5. 50
  6. 35.9
  7. 60
  8. 1100
  9. 42000
  10. 50
  11. 60
  12. 12000
  13. 1400
  14. 900
  15. 56000
  16. 97.9
  17. 1800
  18. 18000
  19. 80
  20. 27000
  21. 53000
  22. 90
  23. 33400
  24. 4000
  25. 45.1
  26. 80
  27. 1500
  28. 18000
  29. 85600
  30. 21000
  31. 18000
  32. 60
  33. 24000
  34. 73.7
  35. 62200
  36. 2100
  37. 29000
  38. 20000
  39. 1000
  40. 7000

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