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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 906 · 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. 1.5.7 × 8 — where does the decimal point go? (a) 4.56 (b) 45.6 (c) 456 (d) 0.456
  2. 2.5.7 × 0.8 — where does the decimal point go? (a) 45.6 (b) 0.456 (c) 4.56 (d) 0.0456
  3. 3.0.99 × 21 — where does the decimal point go? (a) 207.9 (b) 20.79 (c) 2.079 (d) 0.2079
  4. 4.8.7 × 1.1 — where does the decimal point go? (a) 95.7 (b) 0.957 (c) 0.0957 (d) 9.57
  5. 5.0.96 × 43 — where does the decimal point go? (a) 4.128 (b) 412.8 (c) 0.4128 (d) 41.28
  6. 6.0.14 × 1.1 — where does the decimal point go? (a) 0.0154 (b) 0.00154 (c) 1.54 (d) 0.154
  7. 7.5.6 × 0.2 — where does the decimal point go? (a) 0.0112 (b) 11.2 (c) 0.112 (d) 1.12
  8. 8.0.51 × 4.4 — where does the decimal point go? (a) 0.02244 (b) 22.44 (c) 2.244 (d) 0.2244
  9. 9.1.2 × 0.3 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 0.36 (d) 3.6
  10. 10.0.41 × 2 — where does the decimal point go? (a) 0.082 (b) 0.82 (c) 0.0082 (d) 8.2
  11. 11.1.5 × 9 — where does the decimal point go? (a) 135 (b) 0.135 (c) 1.35 (d) 13.5
  12. 12.0.76 × 16 — where does the decimal point go? (a) 1.216 (b) 0.1216 (c) 121.6 (d) 12.16
  13. 13.4.7 × 28 — where does the decimal point go? (a) 13.16 (b) 1316 (c) 1.316 (d) 131.6
  14. 14.9.3 × 2.3 — where does the decimal point go? (a) 21.39 (b) 2.139 (c) 213.9 (d) 0.2139
  15. 15.1.3 × 0.9 — where does the decimal point go? (a) 0.0117 (b) 11.7 (c) 1.17 (d) 0.117
  16. 16.2.5 × 4.3 — where does the decimal point go? (a) 1.075 (b) 107.5 (c) 0.1075 (d) 10.75
  17. 17.2.3 × 49 — where does the decimal point go? (a) 1.127 (b) 1127 (c) 11.27 (d) 112.7
  18. 18.4.4 × 1.7 — where does the decimal point go? (a) 0.748 (b) 0.0748 (c) 7.48 (d) 74.8
  19. 19.4.9 × 4 — where does the decimal point go? (a) 1.96 (b) 0.196 (c) 19.6 (d) 196
  20. 20.0.97 × 2.7 — where does the decimal point go? (a) 0.2619 (b) 2.619 (c) 26.19 (d) 0.02619
  21. 21.0.89 × 2.6 — where does the decimal point go? (a) 0.2314 (b) 23.14 (c) 0.02314 (d) 2.314
  22. 22.0.86 × 0.4 — where does the decimal point go? (a) 0.00344 (b) 3.44 (c) 0.0344 (d) 0.344
  23. 23.9.7 × 2.3 — where does the decimal point go? (a) 223.1 (b) 0.2231 (c) 22.31 (d) 2.231
  24. 24.0.99 × 3 — where does the decimal point go? (a) 2.97 (b) 29.7 (c) 0.0297 (d) 0.297
  25. 25.7.2 × 38 — where does the decimal point go? (a) 273.6 (b) 2.736 (c) 27.36 (d) 2736
  26. 26.0.29 × 0.4 — where does the decimal point go? (a) 0.116 (b) 0.0116 (c) 0.00116 (d) 1.16
  27. 27.2.9 × 0.5 — where does the decimal point go? (a) 14.5 (b) 1.45 (c) 0.0145 (d) 0.145
  28. 28.7.3 × 6 — where does the decimal point go? (a) 438 (b) 4.38 (c) 0.438 (d) 43.8
  29. 29.2.1 × 7 — where does the decimal point go? (a) 0.147 (b) 1.47 (c) 14.7 (d) 147
  30. 30.6.6 × 2 — where does the decimal point go? (a) 132 (b) 1.32 (c) 0.132 (d) 13.2
  31. 31.0.13 × 0.2 — where does the decimal point go? (a) 0.0026 (b) 0.26 (c) 0.00026 (d) 0.026
  32. 32.0.33 × 4.7 — where does the decimal point go? (a) 1.551 (b) 15.51 (c) 0.1551 (d) 0.01551
  33. 33.2.4 × 19 — where does the decimal point go? (a) 0.456 (b) 456 (c) 45.6 (d) 4.56
  34. 34.0.34 × 23 — where does the decimal point go? (a) 78.2 (b) 0.0782 (c) 7.82 (d) 0.782
  35. 35.0.71 × 22 — where does the decimal point go? (a) 1.562 (b) 0.1562 (c) 15.62 (d) 156.2
  36. 36.9.1 × 26 — where does the decimal point go? (a) 2.366 (b) 236.6 (c) 2366 (d) 23.66
  37. 37.8.3 × 4.9 — where does the decimal point go? (a) 40.67 (b) 0.4067 (c) 406.7 (d) 4.067
  38. 38.0.31 × 6 — where does the decimal point go? (a) 18.6 (b) 0.186 (c) 0.0186 (d) 1.86
  39. 39.3.6 × 2 — where does the decimal point go? (a) 0.072 (b) 72 (c) 0.72 (d) 7.2
  40. 40.9.5 × 11 — where does the decimal point go? (a) 104.5 (b) 10.45 (c) 1.045 (d) 1045

Answer key

  1. 45.6
  2. 4.56
  3. 20.79
  4. 9.57
  5. 41.28
  6. 0.154
  7. 1.12
  8. 2.244
  9. 0.36
  10. 0.82
  11. 13.5
  12. 12.16
  13. 131.6
  14. 21.39
  15. 1.17
  16. 10.75
  17. 112.7
  18. 7.48
  19. 19.6
  20. 2.619
  21. 2.314
  22. 0.344
  23. 22.31
  24. 2.97
  25. 273.6
  26. 0.116
  27. 1.45
  28. 43.8
  29. 14.7
  30. 13.2
  31. 0.026
  32. 1.551
  33. 45.6
  34. 7.82
  35. 15.62
  36. 236.6
  37. 40.67
  38. 1.86
  39. 7.2
  40. 104.5

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