← Approximation and estimation lesson New set →

Approximation and Estimation Worksheet

Quantitative aptitude lesson 6: Approximation and estimation · Set 949 · 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 496 × 38? (Round each number first.) (a) 20000 (b) 40000 (c) 200000 (d) 2000
  2. 2.Which is closest to 2007 ÷ 39? (a) 100 (b) 500 (c) 25 (d) 50
  3. 3.Which is closest to 1602 ÷ 19? (a) 160 (b) 40 (c) 80 (d) 800
  4. 4.Which is closest to 397 × 78? (Round each number first.) (a) 3200 (b) 64000 (c) 320000 (d) 32000
  5. 5.Round 89.06 to one decimal place. =
  6. 6.Which is closest to 301 × 52? (Round each number first.) (a) 15000 (b) 1500 (c) 30000 (d) 150000
  7. 7.Round 77915 to the nearest thousand.
  8. 8.Round 98043 to the nearest ten.
  9. 9.Which is closest to 2996 ÷ 49? (a) 60 (b) 30 (c) 600 (d) 120
  10. 10.Round 32307 to the nearest hundred.
  11. 11.Round 69472 to the nearest ten.
  12. 12.Which is closest to 595 + 197 + 505? (a) 1500 (b) 1300 (c) 1200 (d) 1400
  13. 13.Which is closest to 895 + 199 + 397? (a) 1600 (b) 1700 (c) 1500 (d) 1400
  14. 14.Round 45520 to the nearest hundred.
  15. 15.Which is closest to 101 + 301 + 97? (a) 600 (b) 400 (c) 500 (d) 700
  16. 16.Which is closest to 591 ÷ 19? (a) 30 (b) 60 (c) 300 (d) 15
  17. 17.Round 11384 to the nearest hundred.
  18. 18.Which is closest to 1502 ÷ 49? (a) 60 (b) 15 (c) 300 (d) 30
  19. 19.Round 94441 to the nearest thousand.
  20. 20.Which is closest to 3201 ÷ 39? (a) 160 (b) 80 (c) 800 (d) 40
  21. 21.Round 99.58 to one decimal place. =
  22. 22.Which is closest to 195 + 798 + 897? (a) 2000 (b) 1900 (c) 2100 (d) 1800
  23. 23.Round 95.46 to one decimal place. =
  24. 24.Round 81.54 to one decimal place. =
  25. 25.Which is closest to 903 × 89? (Round each number first.) (a) 810000 (b) 162000 (c) 81000 (d) 8100
  26. 26.Which is closest to 801 × 20? (Round each number first.) (a) 16000 (b) 32000 (c) 1600 (d) 160000
  27. 27.Which is closest to 803 × 30? (Round each number first.) (a) 24000 (b) 48000 (c) 240000 (d) 2400
  28. 28.Round 31467 to the nearest ten.
  29. 29.Which is closest to 296 × 92? (Round each number first.) (a) 2700 (b) 27000 (c) 54000 (d) 270000
  30. 30.Which is closest to 400 + 202 + 301? (a) 900 (b) 1100 (c) 800 (d) 1000
  31. 31.Round 66.43 to one decimal place. =
  32. 32.Round 8972 to the nearest hundred.
  33. 33.Which is closest to 595 ÷ 21? (a) 60 (b) 30 (c) 300 (d) 15
  34. 34.Which is closest to 197 × 70? (Round each number first.) (a) 28000 (b) 1400 (c) 140000 (d) 14000
  35. 35.Round 7798 to the nearest hundred.
  36. 36.Round 60280 to the nearest hundred.
  37. 37.Which is closest to 97 + 896 + 204? (a) 1300 (b) 1100 (c) 1400 (d) 1200
  38. 38.Which is closest to 702 × 79? (Round each number first.) (a) 560000 (b) 5600 (c) 112000 (d) 56000
  39. 39.Which is closest to 300 × 59? (Round each number first.) (a) 36000 (b) 180000 (c) 1800 (d) 18000
  40. 40.Which is closest to 597 × 40? (Round each number first.) (a) 48000 (b) 24000 (c) 240000 (d) 2400

Answer key

  1. 20000
  2. 50
  3. 80
  4. 32000
  5. 89.1
  6. 15000
  7. 78000
  8. 98040
  9. 60
  10. 32300
  11. 69470
  12. 1300
  13. 1500
  14. 45500
  15. 500
  16. 30
  17. 11400
  18. 30
  19. 94000
  20. 80
  21. 99.6
  22. 1900
  23. 95.5
  24. 81.5
  25. 81000
  26. 16000
  27. 24000
  28. 31470
  29. 27000
  30. 900
  31. 66.4
  32. 9000
  33. 30
  34. 14000
  35. 7800
  36. 60300
  37. 1200
  38. 56000
  39. 18000
  40. 24000

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