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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 409 · 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. 1.0.54 × 2.1 — where does the decimal point go? (a) 0.1134 (b) 0.01134 (c) 1.134 (d) 11.34
  2. 2.0.22 × 14 — where does the decimal point go? (a) 3.08 (b) 30.8 (c) 0.0308 (d) 0.308
  3. 3.3.9 × 4.4 — where does the decimal point go? (a) 171.6 (b) 1.716 (c) 0.1716 (d) 17.16
  4. 4.8.6 × 0.3 — where does the decimal point go? (a) 25.8 (b) 0.0258 (c) 0.258 (d) 2.58
  5. 5.3.4 × 1.9 — where does the decimal point go? (a) 64.6 (b) 6.46 (c) 0.646 (d) 0.0646
  6. 6.1.7 × 7 — where does the decimal point go? (a) 119 (b) 1.19 (c) 11.9 (d) 0.119
  7. 7.9.8 × 1.2 — where does the decimal point go? (a) 117.6 (b) 1.176 (c) 0.1176 (d) 11.76
  8. 8.9.6 × 14 — where does the decimal point go? (a) 1.344 (b) 1344 (c) 13.44 (d) 134.4
  9. 9.0.38 × 26 — where does the decimal point go? (a) 9.88 (b) 0.988 (c) 0.0988 (d) 98.8
  10. 10.0.83 × 0.8 — where does the decimal point go? (a) 0.0664 (b) 6.64 (c) 0.664 (d) 0.00664
  11. 11.0.34 × 2.7 — where does the decimal point go? (a) 0.00918 (b) 9.18 (c) 0.918 (d) 0.0918
  12. 12.0.23 × 48 — where does the decimal point go? (a) 1.104 (b) 11.04 (c) 0.1104 (d) 110.4
  13. 13.0.56 × 16 — where does the decimal point go? (a) 0.896 (b) 8.96 (c) 89.6 (d) 0.0896
  14. 14.0.21 × 2.6 — where does the decimal point go? (a) 0.546 (b) 5.46 (c) 0.00546 (d) 0.0546
  15. 15.2.4 × 42 — where does the decimal point go? (a) 10.08 (b) 1.008 (c) 1008 (d) 100.8
  16. 16.3.8 × 19 — where does the decimal point go? (a) 722 (b) 0.722 (c) 72.2 (d) 7.22
  17. 17.0.23 × 3 — where does the decimal point go? (a) 6.9 (b) 0.069 (c) 0.69 (d) 0.0069
  18. 18.0.19 × 4 — where does the decimal point go? (a) 0.076 (b) 7.6 (c) 0.76 (d) 0.0076
  19. 19.0.74 × 0.8 — where does the decimal point go? (a) 0.592 (b) 0.0592 (c) 5.92 (d) 0.00592
  20. 20.0.64 × 9 — where does the decimal point go? (a) 5.76 (b) 57.6 (c) 0.0576 (d) 0.576
  21. 21.0.16 × 3 — where does the decimal point go? (a) 0.048 (b) 4.8 (c) 0.48 (d) 0.0048
  22. 22.0.28 × 33 — where does the decimal point go? (a) 92.4 (b) 9.24 (c) 0.0924 (d) 0.924
  23. 23.4.7 × 1.9 — where does the decimal point go? (a) 0.0893 (b) 0.893 (c) 89.3 (d) 8.93
  24. 24.3.7 × 3 — where does the decimal point go? (a) 1.11 (b) 0.111 (c) 111 (d) 11.1
  25. 25.0.33 × 3.9 — where does the decimal point go? (a) 0.1287 (b) 12.87 (c) 0.01287 (d) 1.287
  26. 26.0.17 × 3.7 — where does the decimal point go? (a) 0.0629 (b) 6.29 (c) 0.629 (d) 0.00629
  27. 27.9.4 × 0.3 — where does the decimal point go? (a) 2.82 (b) 28.2 (c) 0.282 (d) 0.0282
  28. 28.2.9 × 2 — where does the decimal point go? (a) 5.8 (b) 0.058 (c) 0.58 (d) 58
  29. 29.8.7 × 3 — where does the decimal point go? (a) 26.1 (b) 2.61 (c) 0.261 (d) 261
  30. 30.0.79 × 46 — where does the decimal point go? (a) 0.3634 (b) 36.34 (c) 363.4 (d) 3.634
  31. 31.0.83 × 5 — where does the decimal point go? (a) 0.0415 (b) 0.415 (c) 41.5 (d) 4.15
  32. 32.0.77 × 3 — where does the decimal point go? (a) 23.1 (b) 2.31 (c) 0.231 (d) 0.0231
  33. 33.2.8 × 28 — where does the decimal point go? (a) 78.4 (b) 784 (c) 7.84 (d) 0.784
  34. 34.0.95 × 3 — where does the decimal point go? (a) 0.285 (b) 0.0285 (c) 2.85 (d) 28.5
  35. 35.0.84 × 0.9 — where does the decimal point go? (a) 0.756 (b) 0.00756 (c) 7.56 (d) 0.0756
  36. 36.4.2 × 3.4 — where does the decimal point go? (a) 14.28 (b) 1.428 (c) 142.8 (d) 0.1428
  37. 37.5.2 × 7 — where does the decimal point go? (a) 364 (b) 3.64 (c) 0.364 (d) 36.4
  38. 38.0.56 × 34 — where does the decimal point go? (a) 0.1904 (b) 1.904 (c) 19.04 (d) 190.4
  39. 39.7.1 × 6 — where does the decimal point go? (a) 0.426 (b) 4.26 (c) 426 (d) 42.6
  40. 40.0.25 × 27 — where does the decimal point go? (a) 67.5 (b) 0.0675 (c) 0.675 (d) 6.75

Answer key

  1. 1.134
  2. 3.08
  3. 17.16
  4. 2.58
  5. 6.46
  6. 11.9
  7. 11.76
  8. 134.4
  9. 9.88
  10. 0.664
  11. 0.918
  12. 11.04
  13. 8.96
  14. 0.546
  15. 100.8
  16. 72.2
  17. 0.69
  18. 0.76
  19. 0.592
  20. 5.76
  21. 0.48
  22. 9.24
  23. 8.93
  24. 11.1
  25. 1.287
  26. 0.629
  27. 2.82
  28. 5.8
  29. 26.1
  30. 36.34
  31. 4.15
  32. 2.31
  33. 78.4
  34. 2.85
  35. 0.756
  36. 14.28
  37. 36.4
  38. 19.04
  39. 42.6
  40. 6.75

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