← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 275 · 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 53251 to the nearest ten.
  2. 2.Which is closest to 402 × 39? (Round each number first.) (a) 1600 (b) 160000 (c) 32000 (d) 16000
  3. 3.Which is closest to 803 + 696 + 98? (a) 1500 (b) 1700 (c) 1600 (d) 1800
  4. 4.Which is closest to 601 + 601 + 597? (a) 1800 (b) 1700 (c) 1900 (d) 2000
  5. 5.Which is closest to 797 × 38? (Round each number first.) (a) 320000 (b) 3200 (c) 64000 (d) 32000
  6. 6.Round 17.56 to one decimal place. =
  7. 7.Which is closest to 900 + 902 + 103? (a) 1800 (b) 1900 (c) 2000 (d) 2100
  8. 8.Which is closest to 793 ÷ 39? (a) 40 (b) 20 (c) 10 (d) 200
  9. 9.Round 28.29 to one decimal place. =
  10. 10.Which is closest to 596 ÷ 19? (a) 300 (b) 15 (c) 30 (d) 60
  11. 11.Which is closest to 603 ÷ 19? (a) 300 (b) 60 (c) 15 (d) 30
  12. 12.Which is closest to 304 × 42? (Round each number first.) (a) 120000 (b) 24000 (c) 1200 (d) 12000
  13. 13.Which is closest to 900 + 799 + 803? (a) 2600 (b) 2400 (c) 2500 (d) 2700
  14. 14.Round 17118 to the nearest ten.
  15. 15.Which is closest to 500 × 52? (Round each number first.) (a) 25000 (b) 250000 (c) 50000 (d) 2500
  16. 16.Which is closest to 596 ÷ 29? (a) 40 (b) 20 (c) 200 (d) 10
  17. 17.Round 16516 to the nearest thousand.
  18. 18.Which is closest to 98 + 599 + 402? (a) 1200 (b) 1000 (c) 1300 (d) 1100
  19. 19.Round 73.48 to one decimal place. =
  20. 20.Round 86.24 to one decimal place. =
  21. 21.Which is closest to 399 × 32? (Round each number first.) (a) 24000 (b) 1200 (c) 120000 (d) 12000
  22. 22.Which is closest to 600 × 72? (Round each number first.) (a) 420000 (b) 84000 (c) 42000 (d) 4200
  23. 23.Which is closest to 3008 ÷ 49? (a) 600 (b) 60 (c) 30 (d) 120
  24. 24.Round 89271 to the nearest thousand.
  25. 25.Which is closest to 797 × 30? (Round each number first.) (a) 48000 (b) 24000 (c) 240000 (d) 2400
  26. 26.Round 36.78 to one decimal place. =
  27. 27.Which is closest to 597 + 101 + 697? (a) 1500 (b) 1400 (c) 1300 (d) 1600
  28. 28.Which is closest to 500 + 105 + 397? (a) 900 (b) 1100 (c) 1200 (d) 1000
  29. 29.Round 65138 to the nearest ten.
  30. 30.Round 30486 to the nearest hundred.
  31. 31.Which is closest to 700 + 304 + 202? (a) 1100 (b) 1200 (c) 1400 (d) 1300
  32. 32.Round 38269 to the nearest ten.
  33. 33.Round 5143 to the nearest ten.
  34. 34.Which is closest to 302 + 698 + 602? (a) 1800 (b) 1500 (c) 1700 (d) 1600
  35. 35.Round 96.93 to one decimal place. =
  36. 36.Which is closest to 702 + 704 + 404? (a) 1700 (b) 2000 (c) 1800 (d) 1900
  37. 37.Round 19.27 to one decimal place. =
  38. 38.Which is closest to 1200 ÷ 39? (a) 15 (b) 60 (c) 300 (d) 30
  39. 39.Round 47.14 to one decimal place. =
  40. 40.Round 68329 to the nearest thousand.

Answer key

  1. 53250
  2. 16000
  3. 1600
  4. 1800
  5. 32000
  6. 17.6
  7. 1900
  8. 20
  9. 28.3
  10. 30
  11. 30
  12. 12000
  13. 2500
  14. 17120
  15. 25000
  16. 20
  17. 17000
  18. 1100
  19. 73.5
  20. 86.2
  21. 12000
  22. 42000
  23. 60
  24. 89000
  25. 24000
  26. 36.8
  27. 1400
  28. 1000
  29. 65140
  30. 30500
  31. 1200
  32. 38270
  33. 5140
  34. 1600
  35. 96.9
  36. 1800
  37. 19.3
  38. 30
  39. 47.1
  40. 68000

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