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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 56 · 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. 1.1.5 × 19 — where does the decimal point go? (a) 28.5 (b) 0.285 (c) 285 (d) 2.85
  2. 2.1.9 × 6 — where does the decimal point go? (a) 114 (b) 1.14 (c) 11.4 (d) 0.114
  3. 3.2.7 × 12 — where does the decimal point go? (a) 0.324 (b) 3.24 (c) 324 (d) 32.4
  4. 4.2.9 × 44 — where does the decimal point go? (a) 1276 (b) 127.6 (c) 1.276 (d) 12.76
  5. 5.0.68 × 3.9 — where does the decimal point go? (a) 26.52 (b) 0.2652 (c) 2.652 (d) 0.02652
  6. 6.2.9 × 0.9 — where does the decimal point go? (a) 0.0261 (b) 26.1 (c) 2.61 (d) 0.261
  7. 7.0.99 × 2.1 — where does the decimal point go? (a) 0.02079 (b) 0.2079 (c) 20.79 (d) 2.079
  8. 8.0.72 × 1.7 — where does the decimal point go? (a) 0.01224 (b) 12.24 (c) 0.1224 (d) 1.224
  9. 9.3.1 × 0.7 — where does the decimal point go? (a) 21.7 (b) 0.217 (c) 0.0217 (d) 2.17
  10. 10.0.66 × 6 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 39.6 (d) 0.0396
  11. 11.9.3 × 0.9 — where does the decimal point go? (a) 83.7 (b) 0.0837 (c) 0.837 (d) 8.37
  12. 12.1.7 × 35 — where does the decimal point go? (a) 595 (b) 59.5 (c) 0.595 (d) 5.95
  13. 13.0.98 × 0.3 — where does the decimal point go? (a) 0.0294 (b) 2.94 (c) 0.00294 (d) 0.294
  14. 14.4.1 × 6 — where does the decimal point go? (a) 0.246 (b) 24.6 (c) 2.46 (d) 246
  15. 15.9.1 × 2 — where does the decimal point go? (a) 1.82 (b) 18.2 (c) 182 (d) 0.182
  16. 16.3.8 × 2.7 — where does the decimal point go? (a) 102.6 (b) 10.26 (c) 1.026 (d) 0.1026
  17. 17.2.7 × 2 — where does the decimal point go? (a) 54 (b) 0.54 (c) 0.054 (d) 5.4
  18. 18.0.87 × 4 — where does the decimal point go? (a) 34.8 (b) 3.48 (c) 0.0348 (d) 0.348
  19. 19.2.8 × 9 — where does the decimal point go? (a) 252 (b) 0.252 (c) 2.52 (d) 25.2
  20. 20.3.1 × 0.8 — where does the decimal point go? (a) 0.0248 (b) 24.8 (c) 0.248 (d) 2.48
  21. 21.0.47 × 0.6 — where does the decimal point go? (a) 0.00282 (b) 0.0282 (c) 2.82 (d) 0.282
  22. 22.4.6 × 2 — where does the decimal point go? (a) 92 (b) 0.92 (c) 0.092 (d) 9.2
  23. 23.3.5 × 0.5 — where does the decimal point go? (a) 0.0175 (b) 1.75 (c) 17.5 (d) 0.175
  24. 24.9.3 × 0.6 — where does the decimal point go? (a) 0.0558 (b) 0.558 (c) 55.8 (d) 5.58
  25. 25.0.89 × 2.5 — where does the decimal point go? (a) 0.2225 (b) 2.225 (c) 22.25 (d) 0.02225
  26. 26.0.38 × 42 — where does the decimal point go? (a) 0.1596 (b) 15.96 (c) 159.6 (d) 1.596
  27. 27.0.92 × 3.7 — where does the decimal point go? (a) 0.3404 (b) 3.404 (c) 0.03404 (d) 34.04
  28. 28.0.79 × 2.7 — where does the decimal point go? (a) 2.133 (b) 0.02133 (c) 0.2133 (d) 21.33
  29. 29.2.6 × 3.9 — where does the decimal point go? (a) 1.014 (b) 0.1014 (c) 10.14 (d) 101.4
  30. 30.1.9 × 4.9 — where does the decimal point go? (a) 0.0931 (b) 93.1 (c) 9.31 (d) 0.931
  31. 31.0.57 × 0.5 — where does the decimal point go? (a) 0.285 (b) 0.0285 (c) 2.85 (d) 0.00285
  32. 32.0.61 × 0.4 — where does the decimal point go? (a) 2.44 (b) 0.0244 (c) 0.00244 (d) 0.244
  33. 33.0.34 × 4 — where does the decimal point go? (a) 0.136 (b) 13.6 (c) 1.36 (d) 0.0136
  34. 34.0.59 × 0.7 — where does the decimal point go? (a) 0.413 (b) 4.13 (c) 0.00413 (d) 0.0413
  35. 35.0.87 × 3.6 — where does the decimal point go? (a) 31.32 (b) 0.3132 (c) 3.132 (d) 0.03132
  36. 36.0.67 × 2.3 — where does the decimal point go? (a) 0.1541 (b) 0.01541 (c) 15.41 (d) 1.541
  37. 37.0.12 × 0.4 — where does the decimal point go? (a) 0.48 (b) 0.00048 (c) 0.0048 (d) 0.048
  38. 38.0.73 × 17 — where does the decimal point go? (a) 0.1241 (b) 1.241 (c) 124.1 (d) 12.41
  39. 39.2.4 × 6 — where does the decimal point go? (a) 14.4 (b) 1.44 (c) 144 (d) 0.144
  40. 40.5.8 × 0.2 — where does the decimal point go? (a) 0.116 (b) 11.6 (c) 0.0116 (d) 1.16

Answer key

  1. 28.5
  2. 11.4
  3. 32.4
  4. 127.6
  5. 2.652
  6. 2.61
  7. 2.079
  8. 1.224
  9. 2.17
  10. 3.96
  11. 8.37
  12. 59.5
  13. 0.294
  14. 24.6
  15. 18.2
  16. 10.26
  17. 5.4
  18. 3.48
  19. 25.2
  20. 2.48
  21. 0.282
  22. 9.2
  23. 1.75
  24. 5.58
  25. 2.225
  26. 15.96
  27. 3.404
  28. 2.133
  29. 10.14
  30. 9.31
  31. 0.285
  32. 0.244
  33. 1.36
  34. 0.413
  35. 3.132
  36. 1.541
  37. 0.048
  38. 12.41
  39. 14.4
  40. 1.16

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