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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 956 · 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. 1.8.8 × 9 — where does the decimal point go? (a) 0.792 (b) 792 (c) 7.92 (d) 79.2
  2. 2.7.7 × 0.3 — where does the decimal point go? (a) 23.1 (b) 0.231 (c) 0.0231 (d) 2.31
  3. 3.0.22 × 28 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 61.6
  4. 4.8.9 × 35 — where does the decimal point go? (a) 31.15 (b) 311.5 (c) 3.115 (d) 3115
  5. 5.0.89 × 7 — where does the decimal point go? (a) 62.3 (b) 6.23 (c) 0.0623 (d) 0.623
  6. 6.0.59 × 0.3 — where does the decimal point go? (a) 0.177 (b) 0.0177 (c) 0.00177 (d) 1.77
  7. 7.0.34 × 0.9 — where does the decimal point go? (a) 0.00306 (b) 0.306 (c) 0.0306 (d) 3.06
  8. 8.5.8 × 0.3 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 0.0174 (d) 17.4
  9. 9.0.39 × 32 — where does the decimal point go? (a) 12.48 (b) 0.1248 (c) 1.248 (d) 124.8
  10. 10.2.6 × 11 — where does the decimal point go? (a) 2.86 (b) 28.6 (c) 0.286 (d) 286
  11. 11.4.5 × 17 — where does the decimal point go? (a) 765 (b) 0.765 (c) 7.65 (d) 76.5
  12. 12.0.25 × 3 — where does the decimal point go? (a) 7.5 (b) 0.075 (c) 0.0075 (d) 0.75
  13. 13.2.2 × 12 — where does the decimal point go? (a) 2.64 (b) 264 (c) 0.264 (d) 26.4
  14. 14.0.94 × 4.1 — where does the decimal point go? (a) 0.3854 (b) 0.03854 (c) 3.854 (d) 38.54
  15. 15.3.1 × 4.2 — where does the decimal point go? (a) 0.1302 (b) 130.2 (c) 1.302 (d) 13.02
  16. 16.8.1 × 45 — where does the decimal point go? (a) 3645 (b) 36.45 (c) 364.5 (d) 3.645
  17. 17.7.9 × 37 — where does the decimal point go? (a) 292.3 (b) 2.923 (c) 29.23 (d) 2923
  18. 18.1.6 × 0.4 — where does the decimal point go? (a) 0.064 (b) 6.4 (c) 0.64 (d) 0.0064
  19. 19.0.81 × 0.7 — where does the decimal point go? (a) 0.567 (b) 0.00567 (c) 5.67 (d) 0.0567
  20. 20.0.72 × 4 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 28.8 (d) 0.0288
  21. 21.3.1 × 9 — where does the decimal point go? (a) 27.9 (b) 2.79 (c) 0.279 (d) 279
  22. 22.1.7 × 19 — where does the decimal point go? (a) 0.323 (b) 32.3 (c) 3.23 (d) 323
  23. 23.0.21 × 3.6 — where does the decimal point go? (a) 0.0756 (b) 0.00756 (c) 7.56 (d) 0.756
  24. 24.0.67 × 48 — where does the decimal point go? (a) 3.216 (b) 32.16 (c) 321.6 (d) 0.3216
  25. 25.4.7 × 0.9 — where does the decimal point go? (a) 4.23 (b) 0.0423 (c) 0.423 (d) 42.3
  26. 26.1.2 × 0.2 — where does the decimal point go? (a) 0.0024 (b) 2.4 (c) 0.24 (d) 0.024
  27. 27.0.74 × 0.9 — where does the decimal point go? (a) 6.66 (b) 0.666 (c) 0.0666 (d) 0.00666
  28. 28.0.46 × 44 — where does the decimal point go? (a) 20.24 (b) 202.4 (c) 2.024 (d) 0.2024
  29. 29.0.32 × 34 — where does the decimal point go? (a) 0.1088 (b) 108.8 (c) 1.088 (d) 10.88
  30. 30.7.9 × 2.1 — where does the decimal point go? (a) 165.9 (b) 0.1659 (c) 16.59 (d) 1.659
  31. 31.8.8 × 0.7 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 61.6 (d) 0.0616
  32. 32.5.3 × 4.3 — where does the decimal point go? (a) 227.9 (b) 0.2279 (c) 2.279 (d) 22.79
  33. 33.4.6 × 9 — where does the decimal point go? (a) 0.414 (b) 41.4 (c) 414 (d) 4.14
  34. 34.5.3 × 18 — where does the decimal point go? (a) 0.954 (b) 95.4 (c) 954 (d) 9.54
  35. 35.4.8 × 0.9 — where does the decimal point go? (a) 0.0432 (b) 43.2 (c) 4.32 (d) 0.432
  36. 36.0.71 × 7 — where does the decimal point go? (a) 0.497 (b) 0.0497 (c) 49.7 (d) 4.97
  37. 37.3.2 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 0.096 (c) 0.96 (d) 9.6
  38. 38.8.9 × 44 — where does the decimal point go? (a) 39.16 (b) 3.916 (c) 3916 (d) 391.6
  39. 39.4.7 × 3.2 — where does the decimal point go? (a) 15.04 (b) 0.1504 (c) 1.504 (d) 150.4
  40. 40.2.4 × 49 — where does the decimal point go? (a) 1176 (b) 11.76 (c) 1.176 (d) 117.6

Answer key

  1. 79.2
  2. 2.31
  3. 6.16
  4. 311.5
  5. 6.23
  6. 0.177
  7. 0.306
  8. 1.74
  9. 12.48
  10. 28.6
  11. 76.5
  12. 0.75
  13. 26.4
  14. 3.854
  15. 13.02
  16. 364.5
  17. 292.3
  18. 0.64
  19. 0.567
  20. 2.88
  21. 27.9
  22. 32.3
  23. 0.756
  24. 32.16
  25. 4.23
  26. 0.24
  27. 0.666
  28. 20.24
  29. 10.88
  30. 16.59
  31. 6.16
  32. 22.79
  33. 41.4
  34. 95.4
  35. 4.32
  36. 4.97
  37. 0.96
  38. 391.6
  39. 15.04
  40. 117.6

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