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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 125 · 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. 1.0.19 × 6 — where does the decimal point go? (a) 11.4 (b) 0.0114 (c) 0.114 (d) 1.14
  2. 2.0.35 × 13 — where does the decimal point go? (a) 0.455 (b) 0.0455 (c) 45.5 (d) 4.55
  3. 3.5.5 × 3.7 — where does the decimal point go? (a) 20.35 (b) 0.2035 (c) 2.035 (d) 203.5
  4. 4.6.4 × 23 — where does the decimal point go? (a) 147.2 (b) 14.72 (c) 1472 (d) 1.472
  5. 5.2.2 × 2.2 — where does the decimal point go? (a) 0.484 (b) 0.0484 (c) 48.4 (d) 4.84
  6. 6.4.2 × 0.9 — where does the decimal point go? (a) 0.378 (b) 0.0378 (c) 37.8 (d) 3.78
  7. 7.0.71 × 2 — where does the decimal point go? (a) 14.2 (b) 0.142 (c) 1.42 (d) 0.0142
  8. 8.0.81 × 7 — where does the decimal point go? (a) 0.567 (b) 0.0567 (c) 56.7 (d) 5.67
  9. 9.2.3 × 8 — where does the decimal point go? (a) 184 (b) 18.4 (c) 0.184 (d) 1.84
  10. 10.9.2 × 12 — where does the decimal point go? (a) 110.4 (b) 1.104 (c) 11.04 (d) 1104
  11. 11.8.7 × 13 — where does the decimal point go? (a) 1131 (b) 1.131 (c) 11.31 (d) 113.1
  12. 12.6.2 × 11 — where does the decimal point go? (a) 6.82 (b) 68.2 (c) 0.682 (d) 682
  13. 13.0.94 × 9 — where does the decimal point go? (a) 84.6 (b) 8.46 (c) 0.846 (d) 0.0846
  14. 14.6.1 × 6 — where does the decimal point go? (a) 0.366 (b) 36.6 (c) 366 (d) 3.66
  15. 15.5.9 × 8 — where does the decimal point go? (a) 472 (b) 47.2 (c) 4.72 (d) 0.472
  16. 16.0.57 × 0.8 — where does the decimal point go? (a) 0.456 (b) 0.0456 (c) 4.56 (d) 0.00456
  17. 17.0.76 × 2.9 — where does the decimal point go? (a) 2.204 (b) 0.02204 (c) 22.04 (d) 0.2204
  18. 18.0.62 × 0.2 — where does the decimal point go? (a) 0.124 (b) 0.00124 (c) 0.0124 (d) 1.24
  19. 19.0.69 × 6 — where does the decimal point go? (a) 41.4 (b) 0.414 (c) 4.14 (d) 0.0414
  20. 20.3.7 × 3 — where does the decimal point go? (a) 111 (b) 1.11 (c) 0.111 (d) 11.1
  21. 21.0.79 × 29 — where does the decimal point go? (a) 0.2291 (b) 229.1 (c) 2.291 (d) 22.91
  22. 22.7.6 × 39 — where does the decimal point go? (a) 2.964 (b) 29.64 (c) 296.4 (d) 2964
  23. 23.0.94 × 2 — where does the decimal point go? (a) 1.88 (b) 0.0188 (c) 18.8 (d) 0.188
  24. 24.0.16 × 6 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 0.0096 (d) 9.6
  25. 25.0.47 × 3.6 — where does the decimal point go? (a) 16.92 (b) 1.692 (c) 0.1692 (d) 0.01692
  26. 26.7.2 × 0.3 — where does the decimal point go? (a) 0.0216 (b) 0.216 (c) 21.6 (d) 2.16
  27. 27.7.1 × 5 — where does the decimal point go? (a) 0.355 (b) 3.55 (c) 355 (d) 35.5
  28. 28.0.38 × 22 — where does the decimal point go? (a) 0.0836 (b) 83.6 (c) 0.836 (d) 8.36
  29. 29.0.17 × 3.4 — where does the decimal point go? (a) 0.578 (b) 0.00578 (c) 0.0578 (d) 5.78
  30. 30.1.2 × 12 — where does the decimal point go? (a) 144 (b) 14.4 (c) 0.144 (d) 1.44
  31. 31.0.45 × 7 — where does the decimal point go? (a) 3.15 (b) 31.5 (c) 0.315 (d) 0.0315
  32. 32.0.15 × 3.5 — where does the decimal point go? (a) 5.25 (b) 0.0525 (c) 0.00525 (d) 0.525
  33. 33.0.23 × 4.5 — where does the decimal point go? (a) 0.1035 (b) 10.35 (c) 1.035 (d) 0.01035
  34. 34.3.7 × 5 — where does the decimal point go? (a) 185 (b) 1.85 (c) 18.5 (d) 0.185
  35. 35.0.79 × 6 — where does the decimal point go? (a) 0.474 (b) 47.4 (c) 0.0474 (d) 4.74
  36. 36.4.4 × 4 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.176 (d) 176
  37. 37.2.3 × 3.1 — where does the decimal point go? (a) 0.713 (b) 7.13 (c) 71.3 (d) 0.0713
  38. 38.0.59 × 19 — where does the decimal point go? (a) 1.121 (b) 0.1121 (c) 11.21 (d) 112.1
  39. 39.3.7 × 43 — where does the decimal point go? (a) 1591 (b) 15.91 (c) 1.591 (d) 159.1
  40. 40.0.89 × 25 — where does the decimal point go? (a) 2.225 (b) 0.2225 (c) 222.5 (d) 22.25

Answer key

  1. 1.14
  2. 4.55
  3. 20.35
  4. 147.2
  5. 4.84
  6. 3.78
  7. 1.42
  8. 5.67
  9. 18.4
  10. 110.4
  11. 113.1
  12. 68.2
  13. 8.46
  14. 36.6
  15. 47.2
  16. 0.456
  17. 2.204
  18. 0.124
  19. 4.14
  20. 11.1
  21. 22.91
  22. 296.4
  23. 1.88
  24. 0.96
  25. 1.692
  26. 2.16
  27. 35.5
  28. 8.36
  29. 0.578
  30. 14.4
  31. 3.15
  32. 0.525
  33. 1.035
  34. 18.5
  35. 4.74
  36. 17.6
  37. 7.13
  38. 11.21
  39. 159.1
  40. 22.25

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