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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 111 · 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. 1.4.4 × 7 — where does the decimal point go? (a) 308 (b) 3.08 (c) 0.308 (d) 30.8
  2. 2.6.9 × 0.9 — where does the decimal point go? (a) 6.21 (b) 0.621 (c) 62.1 (d) 0.0621
  3. 3.5.6 × 9 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 504 (d) 5.04
  4. 4.0.35 × 35 — where does the decimal point go? (a) 1.225 (b) 122.5 (c) 0.1225 (d) 12.25
  5. 5.4.9 × 3 — where does the decimal point go? (a) 1.47 (b) 14.7 (c) 0.147 (d) 147
  6. 6.0.71 × 2 — where does the decimal point go? (a) 0.142 (b) 14.2 (c) 1.42 (d) 0.0142
  7. 7.0.65 × 2.1 — where does the decimal point go? (a) 0.1365 (b) 13.65 (c) 1.365 (d) 0.01365
  8. 8.5.7 × 4 — where does the decimal point go? (a) 228 (b) 2.28 (c) 0.228 (d) 22.8
  9. 9.6.2 × 0.3 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 0.186 (d) 18.6
  10. 10.6.3 × 0.3 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 18.9 (d) 1.89
  11. 11.0.22 × 3.7 — where does the decimal point go? (a) 8.14 (b) 0.0814 (c) 0.814 (d) 0.00814
  12. 12.4.1 × 3.7 — where does the decimal point go? (a) 0.1517 (b) 15.17 (c) 151.7 (d) 1.517
  13. 13.7.9 × 0.5 — where does the decimal point go? (a) 0.0395 (b) 3.95 (c) 39.5 (d) 0.395
  14. 14.0.68 × 3.8 — where does the decimal point go? (a) 2.584 (b) 0.02584 (c) 0.2584 (d) 25.84
  15. 15.0.37 × 1.8 — where does the decimal point go? (a) 0.00666 (b) 6.66 (c) 0.0666 (d) 0.666
  16. 16.0.12 × 7 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 8.4 (d) 0.084
  17. 17.2.6 × 0.7 — where does the decimal point go? (a) 0.0182 (b) 0.182 (c) 18.2 (d) 1.82
  18. 18.0.19 × 45 — where does the decimal point go? (a) 0.855 (b) 8.55 (c) 0.0855 (d) 85.5
  19. 19.0.86 × 0.6 — where does the decimal point go? (a) 5.16 (b) 0.516 (c) 0.0516 (d) 0.00516
  20. 20.0.36 × 4.6 — where does the decimal point go? (a) 0.1656 (b) 0.01656 (c) 16.56 (d) 1.656
  21. 21.3.5 × 5 — where does the decimal point go? (a) 175 (b) 17.5 (c) 0.175 (d) 1.75
  22. 22.0.87 × 8 — where does the decimal point go? (a) 69.6 (b) 0.0696 (c) 0.696 (d) 6.96
  23. 23.0.68 × 6 — where does the decimal point go? (a) 40.8 (b) 0.408 (c) 0.0408 (d) 4.08
  24. 24.4.1 × 4.4 — where does the decimal point go? (a) 1.804 (b) 180.4 (c) 0.1804 (d) 18.04
  25. 25.0.86 × 41 — where does the decimal point go? (a) 0.3526 (b) 35.26 (c) 3.526 (d) 352.6
  26. 26.0.64 × 14 — where does the decimal point go? (a) 8.96 (b) 0.0896 (c) 0.896 (d) 89.6
  27. 27.0.35 × 4.3 — where does the decimal point go? (a) 0.1505 (b) 0.01505 (c) 15.05 (d) 1.505
  28. 28.4.1 × 8 — where does the decimal point go? (a) 3.28 (b) 32.8 (c) 328 (d) 0.328
  29. 29.0.49 × 14 — where does the decimal point go? (a) 6.86 (b) 0.0686 (c) 68.6 (d) 0.686
  30. 30.0.75 × 3 — where does the decimal point go? (a) 2.25 (b) 22.5 (c) 0.225 (d) 0.0225
  31. 31.0.91 × 0.4 — where does the decimal point go? (a) 0.00364 (b) 3.64 (c) 0.0364 (d) 0.364
  32. 32.4.7 × 0.6 — where does the decimal point go? (a) 0.282 (b) 0.0282 (c) 2.82 (d) 28.2
  33. 33.9.7 × 0.2 — where does the decimal point go? (a) 0.0194 (b) 1.94 (c) 19.4 (d) 0.194
  34. 34.0.94 × 8 — where does the decimal point go? (a) 7.52 (b) 0.752 (c) 0.0752 (d) 75.2
  35. 35.0.94 × 2 — where does the decimal point go? (a) 0.188 (b) 18.8 (c) 0.0188 (d) 1.88
  36. 36.0.72 × 1.2 — where does the decimal point go? (a) 0.0864 (b) 8.64 (c) 0.864 (d) 0.00864
  37. 37.6.6 × 0.7 — where does the decimal point go? (a) 0.0462 (b) 4.62 (c) 46.2 (d) 0.462
  38. 38.4.8 × 49 — where does the decimal point go? (a) 2352 (b) 235.2 (c) 2.352 (d) 23.52
  39. 39.0.69 × 4 — where does the decimal point go? (a) 0.0276 (b) 2.76 (c) 0.276 (d) 27.6
  40. 40.0.13 × 2 — where does the decimal point go? (a) 0.26 (b) 0.0026 (c) 2.6 (d) 0.026

Answer key

  1. 30.8
  2. 6.21
  3. 50.4
  4. 12.25
  5. 14.7
  6. 1.42
  7. 1.365
  8. 22.8
  9. 1.86
  10. 1.89
  11. 0.814
  12. 15.17
  13. 3.95
  14. 2.584
  15. 0.666
  16. 0.84
  17. 1.82
  18. 8.55
  19. 0.516
  20. 1.656
  21. 17.5
  22. 6.96
  23. 4.08
  24. 18.04
  25. 35.26
  26. 8.96
  27. 1.505
  28. 32.8
  29. 6.86
  30. 2.25
  31. 0.364
  32. 2.82
  33. 1.94
  34. 7.52
  35. 1.88
  36. 0.864
  37. 4.62
  38. 235.2
  39. 2.76
  40. 0.26

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