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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 37 · 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. 1.1.5 × 3.1 — where does the decimal point go? (a) 4.65 (b) 0.0465 (c) 46.5 (d) 0.465
  2. 2.0.37 × 25 — where does the decimal point go? (a) 9.25 (b) 0.0925 (c) 0.925 (d) 92.5
  3. 3.0.81 × 2 — where does the decimal point go? (a) 0.0162 (b) 0.162 (c) 16.2 (d) 1.62
  4. 4.2.6 × 4 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 10.4 (d) 104
  5. 5.0.85 × 4.7 — where does the decimal point go? (a) 3.995 (b) 0.3995 (c) 0.03995 (d) 39.95
  6. 6.4.9 × 9 — where does the decimal point go? (a) 44.1 (b) 4.41 (c) 0.441 (d) 441
  7. 7.4.2 × 26 — where does the decimal point go? (a) 109.2 (b) 1.092 (c) 1092 (d) 10.92
  8. 8.9.6 × 3 — where does the decimal point go? (a) 28.8 (b) 288 (c) 2.88 (d) 0.288
  9. 9.8.1 × 1.1 — where does the decimal point go? (a) 0.891 (b) 89.1 (c) 0.0891 (d) 8.91
  10. 10.1.4 × 0.6 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.0084 (d) 0.084
  11. 11.0.69 × 4 — where does the decimal point go? (a) 27.6 (b) 0.276 (c) 2.76 (d) 0.0276
  12. 12.5.2 × 0.3 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 0.0156 (d) 0.156
  13. 13.8.7 × 0.3 — where does the decimal point go? (a) 2.61 (b) 0.261 (c) 0.0261 (d) 26.1
  14. 14.0.13 × 32 — where does the decimal point go? (a) 0.416 (b) 41.6 (c) 4.16 (d) 0.0416
  15. 15.5.1 × 0.2 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 1.02 (d) 10.2
  16. 16.0.49 × 37 — where does the decimal point go? (a) 1.813 (b) 181.3 (c) 0.1813 (d) 18.13
  17. 17.6.7 × 4 — where does the decimal point go? (a) 2.68 (b) 268 (c) 0.268 (d) 26.8
  18. 18.0.33 × 6 — where does the decimal point go? (a) 1.98 (b) 19.8 (c) 0.198 (d) 0.0198
  19. 19.0.52 × 7 — where does the decimal point go? (a) 0.364 (b) 3.64 (c) 0.0364 (d) 36.4
  20. 20.7.2 × 0.9 — where does the decimal point go? (a) 0.0648 (b) 6.48 (c) 0.648 (d) 64.8
  21. 21.3.1 × 0.2 — where does the decimal point go? (a) 0.062 (b) 0.0062 (c) 0.62 (d) 6.2
  22. 22.0.12 × 7 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.084 (d) 0.0084
  23. 23.1.9 × 7 — where does the decimal point go? (a) 0.133 (b) 133 (c) 1.33 (d) 13.3
  24. 24.8.8 × 3 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 264 (d) 2.64
  25. 25.0.14 × 4 — where does the decimal point go? (a) 0.0056 (b) 0.056 (c) 5.6 (d) 0.56
  26. 26.0.21 × 0.5 — where does the decimal point go? (a) 0.105 (b) 0.00105 (c) 0.0105 (d) 1.05
  27. 27.0.64 × 4 — where does the decimal point go? (a) 0.256 (b) 0.0256 (c) 2.56 (d) 25.6
  28. 28.1.9 × 22 — where does the decimal point go? (a) 41.8 (b) 0.418 (c) 418 (d) 4.18
  29. 29.3.7 × 6 — where does the decimal point go? (a) 0.222 (b) 222 (c) 22.2 (d) 2.22
  30. 30.0.97 × 24 — where does the decimal point go? (a) 2.328 (b) 23.28 (c) 0.2328 (d) 232.8
  31. 31.2.7 × 22 — where does the decimal point go? (a) 59.4 (b) 594 (c) 5.94 (d) 0.594
  32. 32.1.8 × 0.2 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 3.6 (d) 0.36
  33. 33.0.26 × 4 — where does the decimal point go? (a) 1.04 (b) 0.0104 (c) 10.4 (d) 0.104
  34. 34.3.4 × 0.9 — where does the decimal point go? (a) 0.0306 (b) 0.306 (c) 3.06 (d) 30.6
  35. 35.0.32 × 9 — where does the decimal point go? (a) 28.8 (b) 0.288 (c) 0.0288 (d) 2.88
  36. 36.0.18 × 1.4 — where does the decimal point go? (a) 0.0252 (b) 2.52 (c) 0.252 (d) 0.00252
  37. 37.8.8 × 0.8 — where does the decimal point go? (a) 70.4 (b) 0.704 (c) 0.0704 (d) 7.04
  38. 38.6.6 × 9 — where does the decimal point go? (a) 0.594 (b) 59.4 (c) 594 (d) 5.94
  39. 39.6.7 × 2.3 — where does the decimal point go? (a) 15.41 (b) 1.541 (c) 0.1541 (d) 154.1
  40. 40.0.18 × 18 — where does the decimal point go? (a) 3.24 (b) 0.0324 (c) 0.324 (d) 32.4

Answer key

  1. 4.65
  2. 9.25
  3. 1.62
  4. 10.4
  5. 3.995
  6. 44.1
  7. 109.2
  8. 28.8
  9. 8.91
  10. 0.84
  11. 2.76
  12. 1.56
  13. 2.61
  14. 4.16
  15. 1.02
  16. 18.13
  17. 26.8
  18. 1.98
  19. 3.64
  20. 6.48
  21. 0.62
  22. 0.84
  23. 13.3
  24. 26.4
  25. 0.56
  26. 0.105
  27. 2.56
  28. 41.8
  29. 22.2
  30. 23.28
  31. 59.4
  32. 0.36
  33. 1.04
  34. 3.06
  35. 2.88
  36. 0.252
  37. 7.04
  38. 59.4
  39. 15.41
  40. 3.24

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