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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 66 · 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. 1.0.83 × 5 — where does the decimal point go? (a) 41.5 (b) 0.415 (c) 4.15 (d) 0.0415
  2. 2.3.1 × 36 — where does the decimal point go? (a) 111.6 (b) 1.116 (c) 11.16 (d) 1116
  3. 3.6.5 × 4.7 — where does the decimal point go? (a) 0.3055 (b) 3.055 (c) 30.55 (d) 305.5
  4. 4.0.26 × 3 — where does the decimal point go? (a) 0.078 (b) 0.0078 (c) 7.8 (d) 0.78
  5. 5.6.8 × 6 — where does the decimal point go? (a) 408 (b) 40.8 (c) 4.08 (d) 0.408
  6. 6.0.76 × 1.9 — where does the decimal point go? (a) 14.44 (b) 0.1444 (c) 1.444 (d) 0.01444
  7. 7.4.8 × 2.2 — where does the decimal point go? (a) 0.1056 (b) 105.6 (c) 1.056 (d) 10.56
  8. 8.2.4 × 3.9 — where does the decimal point go? (a) 93.6 (b) 9.36 (c) 0.936 (d) 0.0936
  9. 9.0.36 × 41 — where does the decimal point go? (a) 0.1476 (b) 1.476 (c) 14.76 (d) 147.6
  10. 10.0.79 × 2 — where does the decimal point go? (a) 0.158 (b) 1.58 (c) 0.0158 (d) 15.8
  11. 11.0.46 × 41 — where does the decimal point go? (a) 18.86 (b) 1.886 (c) 0.1886 (d) 188.6
  12. 12.2.5 × 9 — where does the decimal point go? (a) 2.25 (b) 225 (c) 22.5 (d) 0.225
  13. 13.0.43 × 4 — where does the decimal point go? (a) 0.0172 (b) 1.72 (c) 0.172 (d) 17.2
  14. 14.8.2 × 3.6 — where does the decimal point go? (a) 295.2 (b) 2.952 (c) 0.2952 (d) 29.52
  15. 15.0.74 × 2 — where does the decimal point go? (a) 1.48 (b) 14.8 (c) 0.148 (d) 0.0148
  16. 16.0.73 × 1.3 — where does the decimal point go? (a) 9.49 (b) 0.00949 (c) 0.0949 (d) 0.949
  17. 17.0.66 × 7 — where does the decimal point go? (a) 46.2 (b) 4.62 (c) 0.0462 (d) 0.462
  18. 18.0.61 × 16 — where does the decimal point go? (a) 0.976 (b) 9.76 (c) 0.0976 (d) 97.6
  19. 19.3.2 × 9 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 2.88 (d) 288
  20. 20.3.3 × 0.8 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 2.64 (d) 0.0264
  21. 21.1.9 × 4.5 — where does the decimal point go? (a) 85.5 (b) 8.55 (c) 0.855 (d) 0.0855
  22. 22.6.7 × 0.9 — where does the decimal point go? (a) 0.0603 (b) 60.3 (c) 6.03 (d) 0.603
  23. 23.0.75 × 21 — where does the decimal point go? (a) 157.5 (b) 0.1575 (c) 1.575 (d) 15.75
  24. 24.0.37 × 2 — where does the decimal point go? (a) 0.0074 (b) 0.074 (c) 7.4 (d) 0.74
  25. 25.0.39 × 1.4 — where does the decimal point go? (a) 0.00546 (b) 5.46 (c) 0.546 (d) 0.0546
  26. 26.0.42 × 0.2 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 0.00084
  27. 27.2.6 × 6 — where does the decimal point go? (a) 156 (b) 1.56 (c) 0.156 (d) 15.6
  28. 28.2.7 × 8 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 216
  29. 29.1.7 × 0.3 — where does the decimal point go? (a) 0.51 (b) 0.051 (c) 5.1 (d) 0.0051
  30. 30.2.9 × 4.5 — where does the decimal point go? (a) 0.1305 (b) 13.05 (c) 130.5 (d) 1.305
  31. 31.0.81 × 4 — where does the decimal point go? (a) 0.0324 (b) 0.324 (c) 32.4 (d) 3.24
  32. 32.0.92 × 19 — where does the decimal point go? (a) 17.48 (b) 1.748 (c) 0.1748 (d) 174.8
  33. 33.0.82 × 24 — where does the decimal point go? (a) 196.8 (b) 19.68 (c) 1.968 (d) 0.1968
  34. 34.0.56 × 2 — where does the decimal point go? (a) 0.0112 (b) 0.112 (c) 1.12 (d) 11.2
  35. 35.0.27 × 28 — where does the decimal point go? (a) 75.6 (b) 0.0756 (c) 7.56 (d) 0.756
  36. 36.0.42 × 3 — where does the decimal point go? (a) 0.0126 (b) 1.26 (c) 0.126 (d) 12.6
  37. 37.5.9 × 0.4 — where does the decimal point go? (a) 2.36 (b) 0.236 (c) 23.6 (d) 0.0236
  38. 38.0.12 × 39 — where does the decimal point go? (a) 0.0468 (b) 4.68 (c) 0.468 (d) 46.8
  39. 39.4.2 × 2.6 — where does the decimal point go? (a) 1.092 (b) 10.92 (c) 0.1092 (d) 109.2
  40. 40.8.1 × 3.1 — where does the decimal point go? (a) 251.1 (b) 0.2511 (c) 2.511 (d) 25.11

Answer key

  1. 4.15
  2. 111.6
  3. 30.55
  4. 0.78
  5. 40.8
  6. 1.444
  7. 10.56
  8. 9.36
  9. 14.76
  10. 1.58
  11. 18.86
  12. 22.5
  13. 1.72
  14. 29.52
  15. 1.48
  16. 0.949
  17. 4.62
  18. 9.76
  19. 28.8
  20. 2.64
  21. 8.55
  22. 6.03
  23. 15.75
  24. 0.74
  25. 0.546
  26. 0.084
  27. 15.6
  28. 21.6
  29. 0.51
  30. 13.05
  31. 3.24
  32. 17.48
  33. 19.68
  34. 1.12
  35. 7.56
  36. 1.26
  37. 2.36
  38. 4.68
  39. 10.92
  40. 25.11

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