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Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 816 · 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 96.56 to one decimal place. =
  2. 2.Round 59140 to the nearest thousand.
  3. 3.Round 11.29 to one decimal place. =
  4. 4.Which is closest to 600 × 59? (Round each number first.) (a) 360000 (b) 3600 (c) 72000 (d) 36000
  5. 5.Which is closest to 301 + 600 + 904? (a) 1700 (b) 1900 (c) 2000 (d) 1800
  6. 6.Which is closest to 297 × 59? (Round each number first.) (a) 18000 (b) 36000 (c) 180000 (d) 1800
  7. 7.Round 52536 to the nearest thousand.
  8. 8.Round 10456 to the nearest ten.
  9. 9.Which is closest to 3496 ÷ 51? (a) 700 (b) 70 (c) 35 (d) 140
  10. 10.Which is closest to 1494 ÷ 29? (a) 500 (b) 100 (c) 25 (d) 50
  11. 11.Which is closest to 95 + 896 + 296? (a) 1300 (b) 1200 (c) 1500 (d) 1400
  12. 12.Which is closest to 609 ÷ 31? (a) 40 (b) 200 (c) 20 (d) 10
  13. 13.Round 60507 to the nearest ten.
  14. 14.Round 43.73 to one decimal place. =
  15. 15.Which is closest to 1002 ÷ 49? (a) 10 (b) 40 (c) 200 (d) 20
  16. 16.Round 49736 to the nearest ten.
  17. 17.Which is closest to 498 × 31? (Round each number first.) (a) 15000 (b) 30000 (c) 1500 (d) 150000
  18. 18.Which is closest to 302 × 39? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  19. 19.Round 10118 to the nearest ten.
  20. 20.Round 60.21 to one decimal place. =
  21. 21.Which is closest to 498 + 600 + 705? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  22. 22.Round 9151 to the nearest ten.
  23. 23.Which is closest to 300 × 58? (Round each number first.) (a) 180000 (b) 18000 (c) 36000 (d) 1800
  24. 24.Round 31421 to the nearest ten.
  25. 25.Round 40729 to the nearest ten.
  26. 26.Round 69.62 to one decimal place. =
  27. 27.Round 56241 to the nearest ten.
  28. 28.Round 56.33 to one decimal place. =
  29. 29.Which is closest to 396 × 22? (Round each number first.) (a) 16000 (b) 800 (c) 8000 (d) 80000
  30. 30.Round 42509 to the nearest hundred.
  31. 31.Round 48124 to the nearest ten.
  32. 32.Which is closest to 199 × 90? (Round each number first.) (a) 18000 (b) 36000 (c) 1800 (d) 180000
  33. 33.Which is closest to 603 + 600 + 198? (a) 1300 (b) 1400 (c) 1600 (d) 1500
  34. 34.Which is closest to 1791 ÷ 19? (a) 45 (b) 180 (c) 90 (d) 900
  35. 35.Which is closest to 798 ÷ 39? (a) 40 (b) 200 (c) 20 (d) 10
  36. 36.Round 74446 to the nearest ten.
  37. 37.Which is closest to 608 ÷ 21? (a) 300 (b) 30 (c) 15 (d) 60
  38. 38.Which is closest to 401 + 897 + 797? (a) 2100 (b) 2000 (c) 2300 (d) 2200
  39. 39.Round 38.54 to one decimal place. =
  40. 40.Round 43572 to the nearest thousand.

Answer key

  1. 96.6
  2. 59000
  3. 11.3
  4. 36000
  5. 1800
  6. 18000
  7. 53000
  8. 10460
  9. 70
  10. 50
  11. 1300
  12. 20
  13. 60510
  14. 43.7
  15. 20
  16. 49740
  17. 15000
  18. 12000
  19. 10120
  20. 60.2
  21. 1800
  22. 9150
  23. 18000
  24. 31420
  25. 40730
  26. 69.6
  27. 56240
  28. 56.3
  29. 8000
  30. 42500
  31. 48120
  32. 18000
  33. 1400
  34. 90
  35. 20
  36. 74450
  37. 30
  38. 2100
  39. 38.5
  40. 44000

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