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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 988 · 40 questions
TalentJR

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

NameDateTime takenScore ___ / 40
  1. 1.1.7 × 0.5 — where does the decimal point go? (a) 8.5 (b) 0.0085 (c) 0.85 (d) 0.085
  2. 2.0.56 × 6 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 33.6 (d) 3.36
  3. 3.9.2 × 3.9 — where does the decimal point go? (a) 0.3588 (b) 3.588 (c) 35.88 (d) 358.8
  4. 4.4.5 × 19 — where does the decimal point go? (a) 85.5 (b) 0.855 (c) 855 (d) 8.55
  5. 5.9.9 × 41 — where does the decimal point go? (a) 4.059 (b) 405.9 (c) 40.59 (d) 4059
  6. 6.9.4 × 0.7 — where does the decimal point go? (a) 0.0658 (b) 0.658 (c) 65.8 (d) 6.58
  7. 7.0.17 × 2 — where does the decimal point go? (a) 0.0034 (b) 3.4 (c) 0.034 (d) 0.34
  8. 8.1.3 × 0.6 — where does the decimal point go? (a) 0.078 (b) 7.8 (c) 0.0078 (d) 0.78
  9. 9.0.29 × 1.6 — where does the decimal point go? (a) 0.0464 (b) 4.64 (c) 0.464 (d) 0.00464
  10. 10.2.8 × 2.7 — where does the decimal point go? (a) 0.0756 (b) 7.56 (c) 0.756 (d) 75.6
  11. 11.0.24 × 3.2 — where does the decimal point go? (a) 7.68 (b) 0.768 (c) 0.0768 (d) 0.00768
  12. 12.0.73 × 0.3 — where does the decimal point go? (a) 0.0219 (b) 0.219 (c) 0.00219 (d) 2.19
  13. 13.6.9 × 3.8 — where does the decimal point go? (a) 0.2622 (b) 262.2 (c) 26.22 (d) 2.622
  14. 14.0.15 × 0.7 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 0.00105 (d) 0.105
  15. 15.0.24 × 41 — where does the decimal point go? (a) 98.4 (b) 0.984 (c) 0.0984 (d) 9.84
  16. 16.0.75 × 33 — where does the decimal point go? (a) 2.475 (b) 247.5 (c) 24.75 (d) 0.2475
  17. 17.5.4 × 18 — where does the decimal point go? (a) 9.72 (b) 97.2 (c) 972 (d) 0.972
  18. 18.0.49 × 3.7 — where does the decimal point go? (a) 0.01813 (b) 0.1813 (c) 1.813 (d) 18.13
  19. 19.0.42 × 27 — where does the decimal point go? (a) 11.34 (b) 1.134 (c) 0.1134 (d) 113.4
  20. 20.0.47 × 0.2 — where does the decimal point go? (a) 0.0094 (b) 0.00094 (c) 0.94 (d) 0.094
  21. 21.1.5 × 15 — where does the decimal point go? (a) 22.5 (b) 225 (c) 2.25 (d) 0.225
  22. 22.7.5 × 9 — where does the decimal point go? (a) 6.75 (b) 67.5 (c) 0.675 (d) 675
  23. 23.9.6 × 3.1 — where does the decimal point go? (a) 0.2976 (b) 2.976 (c) 29.76 (d) 297.6
  24. 24.2.7 × 36 — where does the decimal point go? (a) 972 (b) 0.972 (c) 9.72 (d) 97.2
  25. 25.3.4 × 9 — where does the decimal point go? (a) 0.306 (b) 3.06 (c) 30.6 (d) 306
  26. 26.2.4 × 7 — where does the decimal point go? (a) 168 (b) 16.8 (c) 1.68 (d) 0.168
  27. 27.3.6 × 3 — where does the decimal point go? (a) 10.8 (b) 1.08 (c) 0.108 (d) 108
  28. 28.2.2 × 4.2 — where does the decimal point go? (a) 92.4 (b) 0.0924 (c) 9.24 (d) 0.924
  29. 29.8.1 × 8 — where does the decimal point go? (a) 64.8 (b) 0.648 (c) 6.48 (d) 648
  30. 30.3.5 × 9 — where does the decimal point go? (a) 3.15 (b) 315 (c) 31.5 (d) 0.315
  31. 31.2.3 × 4.6 — where does the decimal point go? (a) 10.58 (b) 1.058 (c) 0.1058 (d) 105.8
  32. 32.0.13 × 0.5 — where does the decimal point go? (a) 0.65 (b) 0.00065 (c) 0.065 (d) 0.0065
  33. 33.1.5 × 9 — where does the decimal point go? (a) 135 (b) 13.5 (c) 0.135 (d) 1.35
  34. 34.0.43 × 0.2 — where does the decimal point go? (a) 0.086 (b) 0.86 (c) 0.00086 (d) 0.0086
  35. 35.1.2 × 3.1 — where does the decimal point go? (a) 0.0372 (b) 0.372 (c) 37.2 (d) 3.72
  36. 36.0.82 × 1.8 — where does the decimal point go? (a) 14.76 (b) 1.476 (c) 0.01476 (d) 0.1476
  37. 37.0.22 × 0.6 — where does the decimal point go? (a) 0.132 (b) 0.00132 (c) 1.32 (d) 0.0132
  38. 38.0.64 × 16 — where does the decimal point go? (a) 0.1024 (b) 1.024 (c) 10.24 (d) 102.4
  39. 39.0.86 × 7 — where does the decimal point go? (a) 60.2 (b) 0.602 (c) 6.02 (d) 0.0602
  40. 40.6.7 × 3.3 — where does the decimal point go? (a) 22.11 (b) 221.1 (c) 2.211 (d) 0.2211

Answer key

  1. 0.85
  2. 3.36
  3. 35.88
  4. 85.5
  5. 405.9
  6. 6.58
  7. 0.34
  8. 0.78
  9. 0.464
  10. 7.56
  11. 0.768
  12. 0.219
  13. 26.22
  14. 0.105
  15. 9.84
  16. 24.75
  17. 97.2
  18. 1.813
  19. 11.34
  20. 0.094
  21. 22.5
  22. 67.5
  23. 29.76
  24. 97.2
  25. 30.6
  26. 16.8
  27. 10.8
  28. 9.24
  29. 64.8
  30. 31.5
  31. 10.58
  32. 0.065
  33. 13.5
  34. 0.086
  35. 3.72
  36. 1.476
  37. 0.132
  38. 10.24
  39. 6.02
  40. 22.11

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