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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 613 · 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. 1.5.1 × 0.5 — where does the decimal point go? (a) 0.0255 (b) 0.255 (c) 2.55 (d) 25.5
  2. 2.5.1 × 27 — where does the decimal point go? (a) 1.377 (b) 13.77 (c) 1377 (d) 137.7
  3. 3.0.49 × 8 — where does the decimal point go? (a) 0.392 (b) 0.0392 (c) 3.92 (d) 39.2
  4. 4.0.92 × 2.6 — where does the decimal point go? (a) 0.2392 (b) 2.392 (c) 0.02392 (d) 23.92
  5. 5.3.7 × 8 — where does the decimal point go? (a) 296 (b) 0.296 (c) 2.96 (d) 29.6
  6. 6.1.2 × 46 — where does the decimal point go? (a) 0.552 (b) 5.52 (c) 552 (d) 55.2
  7. 7.7.7 × 6 — where does the decimal point go? (a) 4.62 (b) 462 (c) 0.462 (d) 46.2
  8. 8.0.54 × 3.6 — where does the decimal point go? (a) 19.44 (b) 0.01944 (c) 1.944 (d) 0.1944
  9. 9.6.8 × 6 — where does the decimal point go? (a) 40.8 (b) 4.08 (c) 408 (d) 0.408
  10. 10.2.6 × 0.6 — where does the decimal point go? (a) 0.0156 (b) 1.56 (c) 15.6 (d) 0.156
  11. 11.2.2 × 29 — where does the decimal point go? (a) 638 (b) 0.638 (c) 6.38 (d) 63.8
  12. 12.8.8 × 4.7 — where does the decimal point go? (a) 41.36 (b) 0.4136 (c) 4.136 (d) 413.6
  13. 13.4.4 × 0.8 — where does the decimal point go? (a) 0.352 (b) 3.52 (c) 35.2 (d) 0.0352
  14. 14.0.52 × 3 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 15.6 (d) 0.0156
  15. 15.4.8 × 2 — where does the decimal point go? (a) 96 (b) 9.6 (c) 0.96 (d) 0.096
  16. 16.0.13 × 0.2 — where does the decimal point go? (a) 0.26 (b) 0.026 (c) 0.00026 (d) 0.0026
  17. 17.0.93 × 2.7 — where does the decimal point go? (a) 2.511 (b) 0.02511 (c) 25.11 (d) 0.2511
  18. 18.3.8 × 7 — where does the decimal point go? (a) 2.66 (b) 26.6 (c) 0.266 (d) 266
  19. 19.0.31 × 3.7 — where does the decimal point go? (a) 11.47 (b) 0.1147 (c) 0.01147 (d) 1.147
  20. 20.3.3 × 5 — where does the decimal point go? (a) 1.65 (b) 165 (c) 0.165 (d) 16.5
  21. 21.5.6 × 0.6 — where does the decimal point go? (a) 3.36 (b) 33.6 (c) 0.0336 (d) 0.336
  22. 22.3.1 × 3 — where does the decimal point go? (a) 0.93 (b) 93 (c) 0.093 (d) 9.3
  23. 23.2.4 × 0.9 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.0216 (d) 21.6
  24. 24.5.5 × 37 — where does the decimal point go? (a) 2.035 (b) 203.5 (c) 2035 (d) 20.35
  25. 25.0.97 × 1.9 — where does the decimal point go? (a) 1.843 (b) 0.1843 (c) 18.43 (d) 0.01843
  26. 26.0.45 × 0.5 — where does the decimal point go? (a) 0.225 (b) 0.0225 (c) 0.00225 (d) 2.25
  27. 27.0.85 × 35 — where does the decimal point go? (a) 0.2975 (b) 29.75 (c) 2.975 (d) 297.5
  28. 28.0.68 × 17 — where does the decimal point go? (a) 11.56 (b) 115.6 (c) 0.1156 (d) 1.156
  29. 29.0.18 × 1.3 — where does the decimal point go? (a) 0.234 (b) 0.00234 (c) 0.0234 (d) 2.34
  30. 30.0.19 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.00076 (c) 0.0076 (d) 0.076
  31. 31.3.3 × 2 — where does the decimal point go? (a) 6.6 (b) 0.66 (c) 0.066 (d) 66
  32. 32.9.2 × 4 — where does the decimal point go? (a) 36.8 (b) 0.368 (c) 368 (d) 3.68
  33. 33.9.4 × 23 — where does the decimal point go? (a) 21.62 (b) 2.162 (c) 216.2 (d) 2162
  34. 34.7.3 × 3 — where does the decimal point go? (a) 21.9 (b) 0.219 (c) 2.19 (d) 219
  35. 35.1.4 × 21 — where does the decimal point go? (a) 29.4 (b) 2.94 (c) 0.294 (d) 294
  36. 36.0.47 × 16 — where does the decimal point go? (a) 7.52 (b) 0.752 (c) 0.0752 (d) 75.2
  37. 37.0.13 × 7 — where does the decimal point go? (a) 0.91 (b) 0.091 (c) 9.1 (d) 0.0091
  38. 38.0.61 × 2 — where does the decimal point go? (a) 1.22 (b) 12.2 (c) 0.0122 (d) 0.122
  39. 39.0.71 × 2.3 — where does the decimal point go? (a) 1.633 (b) 16.33 (c) 0.1633 (d) 0.01633
  40. 40.6.7 × 2.8 — where does the decimal point go? (a) 0.1876 (b) 18.76 (c) 187.6 (d) 1.876

Answer key

  1. 2.55
  2. 137.7
  3. 3.92
  4. 2.392
  5. 29.6
  6. 55.2
  7. 46.2
  8. 1.944
  9. 40.8
  10. 1.56
  11. 63.8
  12. 41.36
  13. 3.52
  14. 1.56
  15. 9.6
  16. 0.026
  17. 2.511
  18. 26.6
  19. 1.147
  20. 16.5
  21. 3.36
  22. 9.3
  23. 2.16
  24. 203.5
  25. 1.843
  26. 0.225
  27. 29.75
  28. 11.56
  29. 0.234
  30. 0.076
  31. 6.6
  32. 36.8
  33. 216.2
  34. 21.9
  35. 29.4
  36. 7.52
  37. 0.91
  38. 1.22
  39. 1.633
  40. 18.76

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