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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 91 · 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. 1.8.9 × 12 — where does the decimal point go? (a) 106.8 (b) 1.068 (c) 10.68 (d) 1068
  2. 2.6.1 × 3 — where does the decimal point go? (a) 183 (b) 0.183 (c) 1.83 (d) 18.3
  3. 3.0.23 × 0.3 — where does the decimal point go? (a) 0.0069 (b) 0.069 (c) 0.00069 (d) 0.69
  4. 4.2.1 × 6 — where does the decimal point go? (a) 126 (b) 0.126 (c) 1.26 (d) 12.6
  5. 5.1.7 × 6 — where does the decimal point go? (a) 102 (b) 0.102 (c) 10.2 (d) 1.02
  6. 6.1.7 × 21 — where does the decimal point go? (a) 3.57 (b) 0.357 (c) 35.7 (d) 357
  7. 7.0.32 × 9 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.0288 (d) 28.8
  8. 8.3.4 × 0.3 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 10.2 (d) 1.02
  9. 9.0.24 × 9 — where does the decimal point go? (a) 21.6 (b) 0.216 (c) 2.16 (d) 0.0216
  10. 10.0.74 × 9 — where does the decimal point go? (a) 66.6 (b) 0.666 (c) 0.0666 (d) 6.66
  11. 11.7.8 × 8 — where does the decimal point go? (a) 62.4 (b) 6.24 (c) 0.624 (d) 624
  12. 12.8.8 × 19 — where does the decimal point go? (a) 167.2 (b) 1672 (c) 16.72 (d) 1.672
  13. 13.0.28 × 3 — where does the decimal point go? (a) 8.4 (b) 0.084 (c) 0.0084 (d) 0.84
  14. 14.7.9 × 1.6 — where does the decimal point go? (a) 126.4 (b) 12.64 (c) 1.264 (d) 0.1264
  15. 15.2.8 × 4 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 11.2 (d) 112
  16. 16.9.8 × 2 — where does the decimal point go? (a) 19.6 (b) 196 (c) 0.196 (d) 1.96
  17. 17.0.92 × 37 — where does the decimal point go? (a) 0.3404 (b) 3.404 (c) 34.04 (d) 340.4
  18. 18.0.16 × 37 — where does the decimal point go? (a) 0.0592 (b) 0.592 (c) 5.92 (d) 59.2
  19. 19.0.86 × 0.4 — where does the decimal point go? (a) 0.0344 (b) 0.00344 (c) 3.44 (d) 0.344
  20. 20.2.3 × 0.6 — where does the decimal point go? (a) 1.38 (b) 13.8 (c) 0.138 (d) 0.0138
  21. 21.0.14 × 19 — where does the decimal point go? (a) 0.266 (b) 26.6 (c) 0.0266 (d) 2.66
  22. 22.6.6 × 1.3 — where does the decimal point go? (a) 8.58 (b) 0.0858 (c) 85.8 (d) 0.858
  23. 23.7.9 × 6 — where does the decimal point go? (a) 47.4 (b) 0.474 (c) 474 (d) 4.74
  24. 24.0.98 × 2.1 — where does the decimal point go? (a) 0.2058 (b) 2.058 (c) 0.02058 (d) 20.58
  25. 25.0.27 × 8 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.216 (d) 0.0216
  26. 26.0.83 × 36 — where does the decimal point go? (a) 2.988 (b) 298.8 (c) 0.2988 (d) 29.88
  27. 27.0.59 × 0.3 — where does the decimal point go? (a) 1.77 (b) 0.177 (c) 0.00177 (d) 0.0177
  28. 28.3.7 × 3 — where does the decimal point go? (a) 11.1 (b) 1.11 (c) 111 (d) 0.111
  29. 29.7.9 × 12 — where does the decimal point go? (a) 948 (b) 0.948 (c) 94.8 (d) 9.48
  30. 30.0.53 × 32 — where does the decimal point go? (a) 16.96 (b) 0.1696 (c) 169.6 (d) 1.696
  31. 31.0.91 × 4.2 — where does the decimal point go? (a) 38.22 (b) 0.03822 (c) 0.3822 (d) 3.822
  32. 32.8.5 × 15 — where does the decimal point go? (a) 12.75 (b) 1.275 (c) 127.5 (d) 1275
  33. 33.1.8 × 9 — where does the decimal point go? (a) 162 (b) 0.162 (c) 1.62 (d) 16.2
  34. 34.1.7 × 0.8 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 13.6 (d) 0.136
  35. 35.2.9 × 5 — where does the decimal point go? (a) 145 (b) 14.5 (c) 0.145 (d) 1.45
  36. 36.8.5 × 7 — where does the decimal point go? (a) 5.95 (b) 59.5 (c) 595 (d) 0.595
  37. 37.2.1 × 1.4 — where does the decimal point go? (a) 0.0294 (b) 0.294 (c) 29.4 (d) 2.94
  38. 38.0.99 × 3.9 — where does the decimal point go? (a) 0.3861 (b) 3.861 (c) 0.03861 (d) 38.61
  39. 39.0.29 × 0.8 — where does the decimal point go? (a) 2.32 (b) 0.0232 (c) 0.232 (d) 0.00232
  40. 40.8.6 × 7 — where does the decimal point go? (a) 0.602 (b) 6.02 (c) 602 (d) 60.2

Answer key

  1. 106.8
  2. 18.3
  3. 0.069
  4. 12.6
  5. 10.2
  6. 35.7
  7. 2.88
  8. 1.02
  9. 2.16
  10. 6.66
  11. 62.4
  12. 167.2
  13. 0.84
  14. 12.64
  15. 11.2
  16. 19.6
  17. 34.04
  18. 5.92
  19. 0.344
  20. 1.38
  21. 2.66
  22. 8.58
  23. 47.4
  24. 2.058
  25. 2.16
  26. 29.88
  27. 0.177
  28. 11.1
  29. 94.8
  30. 16.96
  31. 3.822
  32. 127.5
  33. 16.2
  34. 1.36
  35. 14.5
  36. 59.5
  37. 2.94
  38. 3.861
  39. 0.232
  40. 60.2

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