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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 484 · 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. 1.9.1 × 8 — where does the decimal point go? (a) 7.28 (b) 72.8 (c) 0.728 (d) 728
  2. 2.0.75 × 3 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 22.5 (d) 0.0225
  3. 3.6.6 × 0.8 — where does the decimal point go? (a) 5.28 (b) 52.8 (c) 0.528 (d) 0.0528
  4. 4.0.96 × 6 — where does the decimal point go? (a) 0.576 (b) 57.6 (c) 0.0576 (d) 5.76
  5. 5.6.9 × 0.9 — where does the decimal point go? (a) 0.621 (b) 62.1 (c) 6.21 (d) 0.0621
  6. 6.0.25 × 1.3 — where does the decimal point go? (a) 0.00325 (b) 0.325 (c) 3.25 (d) 0.0325
  7. 7.0.48 × 4.1 — where does the decimal point go? (a) 0.01968 (b) 1.968 (c) 0.1968 (d) 19.68
  8. 8.0.62 × 8 — where does the decimal point go? (a) 4.96 (b) 49.6 (c) 0.0496 (d) 0.496
  9. 9.1.3 × 4.2 — where does the decimal point go? (a) 5.46 (b) 54.6 (c) 0.0546 (d) 0.546
  10. 10.0.52 × 0.8 — where does the decimal point go? (a) 4.16 (b) 0.0416 (c) 0.00416 (d) 0.416
  11. 11.9.4 × 2 — where does the decimal point go? (a) 188 (b) 1.88 (c) 0.188 (d) 18.8
  12. 12.5.4 × 9 — where does the decimal point go? (a) 48.6 (b) 486 (c) 0.486 (d) 4.86
  13. 13.2.3 × 2 — where does the decimal point go? (a) 4.6 (b) 0.046 (c) 0.46 (d) 46
  14. 14.1.2 × 3.8 — where does the decimal point go? (a) 0.456 (b) 45.6 (c) 4.56 (d) 0.0456
  15. 15.0.32 × 0.9 — where does the decimal point go? (a) 0.0288 (b) 0.00288 (c) 2.88 (d) 0.288
  16. 16.8.9 × 0.2 — where does the decimal point go? (a) 1.78 (b) 0.178 (c) 0.0178 (d) 17.8
  17. 17.2.7 × 4.7 — where does the decimal point go? (a) 0.1269 (b) 1.269 (c) 126.9 (d) 12.69
  18. 18.0.69 × 7 — where does the decimal point go? (a) 4.83 (b) 48.3 (c) 0.0483 (d) 0.483
  19. 19.6.2 × 6 — where does the decimal point go? (a) 0.372 (b) 372 (c) 3.72 (d) 37.2
  20. 20.8.3 × 3.1 — where does the decimal point go? (a) 25.73 (b) 257.3 (c) 0.2573 (d) 2.573
  21. 21.0.69 × 4 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 27.6 (d) 0.0276
  22. 22.0.67 × 4.7 — where does the decimal point go? (a) 0.03149 (b) 0.3149 (c) 31.49 (d) 3.149
  23. 23.0.47 × 1.1 — where does the decimal point go? (a) 0.00517 (b) 0.0517 (c) 0.517 (d) 5.17
  24. 24.0.16 × 0.9 — where does the decimal point go? (a) 0.144 (b) 0.0144 (c) 0.00144 (d) 1.44
  25. 25.0.34 × 36 — where does the decimal point go? (a) 0.1224 (b) 12.24 (c) 122.4 (d) 1.224
  26. 26.0.73 × 2.4 — where does the decimal point go? (a) 0.01752 (b) 1.752 (c) 0.1752 (d) 17.52
  27. 27.0.29 × 13 — where does the decimal point go? (a) 0.0377 (b) 0.377 (c) 3.77 (d) 37.7
  28. 28.5.9 × 2 — where does the decimal point go? (a) 11.8 (b) 118 (c) 1.18 (d) 0.118
  29. 29.0.16 × 0.3 — where does the decimal point go? (a) 0.048 (b) 0.00048 (c) 0.0048 (d) 0.48
  30. 30.0.59 × 6 — where does the decimal point go? (a) 3.54 (b) 0.354 (c) 0.0354 (d) 35.4
  31. 31.7.7 × 0.8 — where does the decimal point go? (a) 6.16 (b) 0.616 (c) 0.0616 (d) 61.6
  32. 32.0.92 × 9 — where does the decimal point go? (a) 0.828 (b) 0.0828 (c) 82.8 (d) 8.28
  33. 33.2.2 × 0.8 — where does the decimal point go? (a) 17.6 (b) 0.0176 (c) 1.76 (d) 0.176
  34. 34.0.81 × 0.8 — where does the decimal point go? (a) 0.00648 (b) 0.0648 (c) 6.48 (d) 0.648
  35. 35.9.9 × 9 — where does the decimal point go? (a) 89.1 (b) 0.891 (c) 891 (d) 8.91
  36. 36.0.33 × 0.6 — where does the decimal point go? (a) 0.198 (b) 0.0198 (c) 1.98 (d) 0.00198
  37. 37.2.2 × 7 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 154 (d) 15.4
  38. 38.5.9 × 0.8 — where does the decimal point go? (a) 4.72 (b) 0.472 (c) 47.2 (d) 0.0472
  39. 39.0.82 × 0.9 — where does the decimal point go? (a) 0.00738 (b) 7.38 (c) 0.738 (d) 0.0738
  40. 40.0.19 × 48 — where does the decimal point go? (a) 9.12 (b) 0.0912 (c) 91.2 (d) 0.912

Answer key

  1. 72.8
  2. 2.25
  3. 5.28
  4. 5.76
  5. 6.21
  6. 0.325
  7. 1.968
  8. 4.96
  9. 5.46
  10. 0.416
  11. 18.8
  12. 48.6
  13. 4.6
  14. 4.56
  15. 0.288
  16. 1.78
  17. 12.69
  18. 4.83
  19. 37.2
  20. 25.73
  21. 2.76
  22. 3.149
  23. 0.517
  24. 0.144
  25. 12.24
  26. 1.752
  27. 3.77
  28. 11.8
  29. 0.048
  30. 3.54
  31. 6.16
  32. 8.28
  33. 1.76
  34. 0.648
  35. 89.1
  36. 0.198
  37. 15.4
  38. 4.72
  39. 0.738
  40. 9.12

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