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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 351 · 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. 1.0.22 × 42 — where does the decimal point go? (a) 0.924 (b) 92.4 (c) 9.24 (d) 0.0924
  2. 2.0.33 × 0.2 — where does the decimal point go? (a) 0.066 (b) 0.66 (c) 0.0066 (d) 0.00066
  3. 3.0.42 × 0.2 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 0.084 (d) 0.00084
  4. 4.0.13 × 46 — where does the decimal point go? (a) 59.8 (b) 5.98 (c) 0.0598 (d) 0.598
  5. 5.7.8 × 19 — where does the decimal point go? (a) 14.82 (b) 1.482 (c) 148.2 (d) 1482
  6. 6.0.97 × 2.1 — where does the decimal point go? (a) 0.02037 (b) 20.37 (c) 2.037 (d) 0.2037
  7. 7.2.5 × 41 — where does the decimal point go? (a) 1025 (b) 102.5 (c) 10.25 (d) 1.025
  8. 8.7.9 × 12 — where does the decimal point go? (a) 0.948 (b) 94.8 (c) 948 (d) 9.48
  9. 9.0.86 × 7 — where does the decimal point go? (a) 0.602 (b) 6.02 (c) 0.0602 (d) 60.2
  10. 10.1.2 × 4 — where does the decimal point go? (a) 48 (b) 0.48 (c) 4.8 (d) 0.048
  11. 11.0.26 × 4 — where does the decimal point go? (a) 0.104 (b) 0.0104 (c) 1.04 (d) 10.4
  12. 12.0.71 × 0.2 — where does the decimal point go? (a) 0.0142 (b) 0.142 (c) 1.42 (d) 0.00142
  13. 13.0.83 × 6 — where does the decimal point go? (a) 0.0498 (b) 0.498 (c) 49.8 (d) 4.98
  14. 14.0.62 × 41 — where does the decimal point go? (a) 0.2542 (b) 254.2 (c) 2.542 (d) 25.42
  15. 15.0.86 × 0.3 — where does the decimal point go? (a) 2.58 (b) 0.0258 (c) 0.258 (d) 0.00258
  16. 16.1.2 × 43 — where does the decimal point go? (a) 5.16 (b) 0.516 (c) 51.6 (d) 516
  17. 17.4.2 × 8 — where does the decimal point go? (a) 33.6 (b) 0.336 (c) 336 (d) 3.36
  18. 18.9.3 × 9 — where does the decimal point go? (a) 8.37 (b) 83.7 (c) 0.837 (d) 837
  19. 19.2.9 × 1.1 — where does the decimal point go? (a) 31.9 (b) 3.19 (c) 0.0319 (d) 0.319
  20. 20.5.8 × 9 — where does the decimal point go? (a) 0.522 (b) 52.2 (c) 522 (d) 5.22
  21. 21.7.9 × 1.1 — where does the decimal point go? (a) 0.0869 (b) 86.9 (c) 8.69 (d) 0.869
  22. 22.0.18 × 0.9 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 1.62 (d) 0.00162
  23. 23.0.79 × 2.8 — where does the decimal point go? (a) 0.02212 (b) 0.2212 (c) 22.12 (d) 2.212
  24. 24.5.4 × 4 — where does the decimal point go? (a) 0.216 (b) 21.6 (c) 2.16 (d) 216
  25. 25.0.16 × 2 — where does the decimal point go? (a) 0.32 (b) 0.032 (c) 0.0032 (d) 3.2
  26. 26.9.6 × 0.8 — where does the decimal point go? (a) 0.0768 (b) 76.8 (c) 0.768 (d) 7.68
  27. 27.8.7 × 5 — where does the decimal point go? (a) 435 (b) 0.435 (c) 4.35 (d) 43.5
  28. 28.0.17 × 9 — where does the decimal point go? (a) 15.3 (b) 0.153 (c) 1.53 (d) 0.0153
  29. 29.0.71 × 0.4 — where does the decimal point go? (a) 0.00284 (b) 0.284 (c) 0.0284 (d) 2.84
  30. 30.2.6 × 22 — where does the decimal point go? (a) 57.2 (b) 5.72 (c) 572 (d) 0.572
  31. 31.7.6 × 17 — where does the decimal point go? (a) 12.92 (b) 129.2 (c) 1292 (d) 1.292
  32. 32.2.8 × 0.7 — where does the decimal point go? (a) 0.196 (b) 0.0196 (c) 19.6 (d) 1.96
  33. 33.2.9 × 9 — where does the decimal point go? (a) 26.1 (b) 2.61 (c) 261 (d) 0.261
  34. 34.0.95 × 1.3 — where does the decimal point go? (a) 1.235 (b) 12.35 (c) 0.01235 (d) 0.1235
  35. 35.0.48 × 37 — where does the decimal point go? (a) 177.6 (b) 1.776 (c) 0.1776 (d) 17.76
  36. 36.0.23 × 1.1 — where does the decimal point go? (a) 0.00253 (b) 2.53 (c) 0.0253 (d) 0.253
  37. 37.5.2 × 3 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 15.6 (d) 156
  38. 38.5.4 × 2 — where does the decimal point go? (a) 10.8 (b) 0.108 (c) 108 (d) 1.08
  39. 39.0.18 × 2 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 0.0036 (d) 3.6
  40. 40.0.39 × 5 — where does the decimal point go? (a) 19.5 (b) 0.0195 (c) 1.95 (d) 0.195

Answer key

  1. 9.24
  2. 0.066
  3. 0.084
  4. 5.98
  5. 148.2
  6. 2.037
  7. 102.5
  8. 94.8
  9. 6.02
  10. 4.8
  11. 1.04
  12. 0.142
  13. 4.98
  14. 25.42
  15. 0.258
  16. 51.6
  17. 33.6
  18. 83.7
  19. 3.19
  20. 52.2
  21. 8.69
  22. 0.162
  23. 2.212
  24. 21.6
  25. 0.32
  26. 7.68
  27. 43.5
  28. 1.53
  29. 0.284
  30. 57.2
  31. 129.2
  32. 1.96
  33. 26.1
  34. 1.235
  35. 17.76
  36. 0.253
  37. 15.6
  38. 10.8
  39. 0.36
  40. 1.95

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