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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 999 · 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. 1.0.69 × 3.3 — where does the decimal point go? (a) 22.77 (b) 2.277 (c) 0.02277 (d) 0.2277
  2. 2.0.33 × 0.8 — where does the decimal point go? (a) 0.0264 (b) 0.264 (c) 2.64 (d) 0.00264
  3. 3.0.39 × 3.7 — where does the decimal point go? (a) 0.01443 (b) 14.43 (c) 1.443 (d) 0.1443
  4. 4.0.36 × 0.4 — where does the decimal point go? (a) 0.00144 (b) 0.0144 (c) 1.44 (d) 0.144
  5. 5.0.92 × 12 — where does the decimal point go? (a) 0.1104 (b) 1.104 (c) 110.4 (d) 11.04
  6. 6.3.3 × 2.5 — where does the decimal point go? (a) 8.25 (b) 0.0825 (c) 82.5 (d) 0.825
  7. 7.0.79 × 8 — where does the decimal point go? (a) 6.32 (b) 0.0632 (c) 63.2 (d) 0.632
  8. 8.2.1 × 2.3 — where does the decimal point go? (a) 48.3 (b) 0.0483 (c) 0.483 (d) 4.83
  9. 9.6.2 × 0.3 — where does the decimal point go? (a) 0.186 (b) 18.6 (c) 0.0186 (d) 1.86
  10. 10.0.74 × 2 — where does the decimal point go? (a) 1.48 (b) 14.8 (c) 0.0148 (d) 0.148
  11. 11.0.26 × 6 — where does the decimal point go? (a) 0.0156 (b) 1.56 (c) 15.6 (d) 0.156
  12. 12.8.9 × 4.7 — where does the decimal point go? (a) 41.83 (b) 0.4183 (c) 418.3 (d) 4.183
  13. 13.0.76 × 2 — where does the decimal point go? (a) 15.2 (b) 1.52 (c) 0.152 (d) 0.0152
  14. 14.0.91 × 0.4 — where does the decimal point go? (a) 0.00364 (b) 3.64 (c) 0.364 (d) 0.0364
  15. 15.0.22 × 0.3 — where does the decimal point go? (a) 0.66 (b) 0.066 (c) 0.0066 (d) 0.00066
  16. 16.0.46 × 0.9 — where does the decimal point go? (a) 0.414 (b) 0.0414 (c) 0.00414 (d) 4.14
  17. 17.4.6 × 1.8 — where does the decimal point go? (a) 82.8 (b) 0.828 (c) 0.0828 (d) 8.28
  18. 18.3.7 × 0.3 — where does the decimal point go? (a) 1.11 (b) 0.111 (c) 0.0111 (d) 11.1
  19. 19.0.99 × 3 — where does the decimal point go? (a) 29.7 (b) 0.0297 (c) 0.297 (d) 2.97
  20. 20.0.45 × 15 — where does the decimal point go? (a) 67.5 (b) 6.75 (c) 0.675 (d) 0.0675
  21. 21.7.3 × 9 — where does the decimal point go? (a) 65.7 (b) 0.657 (c) 657 (d) 6.57
  22. 22.0.76 × 4 — where does the decimal point go? (a) 3.04 (b) 0.304 (c) 0.0304 (d) 30.4
  23. 23.0.79 × 0.4 — where does the decimal point go? (a) 0.0316 (b) 3.16 (c) 0.00316 (d) 0.316
  24. 24.1.2 × 2.9 — where does the decimal point go? (a) 34.8 (b) 0.0348 (c) 3.48 (d) 0.348
  25. 25.2.9 × 0.4 — where does the decimal point go? (a) 11.6 (b) 1.16 (c) 0.0116 (d) 0.116
  26. 26.7.9 × 4.8 — where does the decimal point go? (a) 0.3792 (b) 37.92 (c) 3.792 (d) 379.2
  27. 27.2.5 × 2.7 — where does the decimal point go? (a) 67.5 (b) 0.0675 (c) 6.75 (d) 0.675
  28. 28.0.71 × 3 — where does the decimal point go? (a) 0.213 (b) 21.3 (c) 2.13 (d) 0.0213
  29. 29.8.2 × 1.9 — where does the decimal point go? (a) 15.58 (b) 1.558 (c) 155.8 (d) 0.1558
  30. 30.0.85 × 0.5 — where does the decimal point go? (a) 4.25 (b) 0.0425 (c) 0.425 (d) 0.00425
  31. 31.3.8 × 49 — where does the decimal point go? (a) 1862 (b) 1.862 (c) 18.62 (d) 186.2
  32. 32.0.95 × 2.1 — where does the decimal point go? (a) 0.01995 (b) 0.1995 (c) 1.995 (d) 19.95
  33. 33.0.23 × 34 — where does the decimal point go? (a) 0.0782 (b) 0.782 (c) 78.2 (d) 7.82
  34. 34.0.85 × 43 — where does the decimal point go? (a) 36.55 (b) 3.655 (c) 365.5 (d) 0.3655
  35. 35.0.96 × 9 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 0.0864 (d) 8.64
  36. 36.2.1 × 1.7 — where does the decimal point go? (a) 0.0357 (b) 0.357 (c) 3.57 (d) 35.7
  37. 37.3.4 × 6 — where does the decimal point go? (a) 20.4 (b) 204 (c) 0.204 (d) 2.04
  38. 38.2.7 × 8 — where does the decimal point go? (a) 21.6 (b) 2.16 (c) 0.216 (d) 216
  39. 39.0.59 × 0.5 — where does the decimal point go? (a) 0.295 (b) 0.0295 (c) 0.00295 (d) 2.95
  40. 40.7.1 × 29 — where does the decimal point go? (a) 2059 (b) 2.059 (c) 20.59 (d) 205.9

Answer key

  1. 2.277
  2. 0.264
  3. 1.443
  4. 0.144
  5. 11.04
  6. 8.25
  7. 6.32
  8. 4.83
  9. 1.86
  10. 1.48
  11. 1.56
  12. 41.83
  13. 1.52
  14. 0.364
  15. 0.066
  16. 0.414
  17. 8.28
  18. 1.11
  19. 2.97
  20. 6.75
  21. 65.7
  22. 3.04
  23. 0.316
  24. 3.48
  25. 1.16
  26. 37.92
  27. 6.75
  28. 2.13
  29. 15.58
  30. 0.425
  31. 186.2
  32. 1.995
  33. 7.82
  34. 36.55
  35. 8.64
  36. 3.57
  37. 20.4
  38. 21.6
  39. 0.295
  40. 205.9

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