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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 698 · 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. 1.2.1 × 22 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 46.2 (d) 462
  2. 2.0.82 × 8 — where does the decimal point go? (a) 0.0656 (b) 65.6 (c) 0.656 (d) 6.56
  3. 3.0.81 × 8 — where does the decimal point go? (a) 6.48 (b) 0.648 (c) 0.0648 (d) 64.8
  4. 4.1.6 × 0.6 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 9.6 (d) 0.096
  5. 5.0.99 × 44 — where does the decimal point go? (a) 4.356 (b) 43.56 (c) 435.6 (d) 0.4356
  6. 6.0.83 × 5 — where does the decimal point go? (a) 0.415 (b) 0.0415 (c) 4.15 (d) 41.5
  7. 7.0.91 × 38 — where does the decimal point go? (a) 345.8 (b) 34.58 (c) 3.458 (d) 0.3458
  8. 8.6.8 × 2 — where does the decimal point go? (a) 1.36 (b) 136 (c) 13.6 (d) 0.136
  9. 9.4.4 × 1.9 — where does the decimal point go? (a) 0.836 (b) 83.6 (c) 8.36 (d) 0.0836
  10. 10.3.9 × 4 — where does the decimal point go? (a) 0.156 (b) 156 (c) 1.56 (d) 15.6
  11. 11.0.43 × 0.2 — where does the decimal point go? (a) 0.86 (b) 0.086 (c) 0.0086 (d) 0.00086
  12. 12.2.2 × 31 — where does the decimal point go? (a) 68.2 (b) 0.682 (c) 682 (d) 6.82
  13. 13.4.4 × 18 — where does the decimal point go? (a) 7.92 (b) 79.2 (c) 792 (d) 0.792
  14. 14.3.9 × 0.8 — where does the decimal point go? (a) 3.12 (b) 31.2 (c) 0.312 (d) 0.0312
  15. 15.0.37 × 6 — where does the decimal point go? (a) 0.0222 (b) 22.2 (c) 0.222 (d) 2.22
  16. 16.7.2 × 37 — where does the decimal point go? (a) 266.4 (b) 26.64 (c) 2.664 (d) 2664
  17. 17.0.77 × 0.2 — where does the decimal point go? (a) 0.154 (b) 0.0154 (c) 0.00154 (d) 1.54
  18. 18.2.7 × 0.2 — where does the decimal point go? (a) 5.4 (b) 0.054 (c) 0.0054 (d) 0.54
  19. 19.0.86 × 9 — where does the decimal point go? (a) 0.774 (b) 0.0774 (c) 77.4 (d) 7.74
  20. 20.3.2 × 1.6 — where does the decimal point go? (a) 0.0512 (b) 51.2 (c) 5.12 (d) 0.512
  21. 21.0.74 × 0.3 — where does the decimal point go? (a) 0.0222 (b) 2.22 (c) 0.00222 (d) 0.222
  22. 22.3.1 × 8 — where does the decimal point go? (a) 2.48 (b) 248 (c) 24.8 (d) 0.248
  23. 23.3.7 × 24 — where does the decimal point go? (a) 0.888 (b) 8.88 (c) 88.8 (d) 888
  24. 24.0.74 × 43 — where does the decimal point go? (a) 318.2 (b) 0.3182 (c) 31.82 (d) 3.182
  25. 25.0.51 × 0.3 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 0.0153 (d) 0.00153
  26. 26.0.28 × 7 — where does the decimal point go? (a) 0.196 (b) 1.96 (c) 0.0196 (d) 19.6
  27. 27.9.2 × 22 — where does the decimal point go? (a) 2.024 (b) 20.24 (c) 202.4 (d) 2024
  28. 28.0.33 × 0.7 — where does the decimal point go? (a) 0.231 (b) 0.00231 (c) 0.0231 (d) 2.31
  29. 29.0.17 × 3.4 — where does the decimal point go? (a) 0.00578 (b) 0.578 (c) 5.78 (d) 0.0578
  30. 30.0.24 × 0.2 — where does the decimal point go? (a) 0.048 (b) 0.48 (c) 0.00048 (d) 0.0048
  31. 31.0.57 × 4 — where does the decimal point go? (a) 22.8 (b) 0.228 (c) 2.28 (d) 0.0228
  32. 32.8.7 × 0.9 — where does the decimal point go? (a) 0.783 (b) 78.3 (c) 0.0783 (d) 7.83
  33. 33.0.45 × 0.5 — where does the decimal point go? (a) 2.25 (b) 0.0225 (c) 0.225 (d) 0.00225
  34. 34.9.5 × 5 — where does the decimal point go? (a) 47.5 (b) 0.475 (c) 4.75 (d) 475
  35. 35.0.24 × 2.8 — where does the decimal point go? (a) 0.00672 (b) 0.672 (c) 0.0672 (d) 6.72
  36. 36.0.36 × 2.8 — where does the decimal point go? (a) 10.08 (b) 1.008 (c) 0.01008 (d) 0.1008
  37. 37.6.3 × 0.5 — where does the decimal point go? (a) 0.0315 (b) 31.5 (c) 3.15 (d) 0.315
  38. 38.0.66 × 6 — where does the decimal point go? (a) 3.96 (b) 0.396 (c) 39.6 (d) 0.0396
  39. 39.0.79 × 48 — where does the decimal point go? (a) 3.792 (b) 0.3792 (c) 379.2 (d) 37.92
  40. 40.0.65 × 0.7 — where does the decimal point go? (a) 0.455 (b) 0.0455 (c) 0.00455 (d) 4.55

Answer key

  1. 46.2
  2. 6.56
  3. 6.48
  4. 0.96
  5. 43.56
  6. 4.15
  7. 34.58
  8. 13.6
  9. 8.36
  10. 15.6
  11. 0.086
  12. 68.2
  13. 79.2
  14. 3.12
  15. 2.22
  16. 266.4
  17. 0.154
  18. 0.54
  19. 7.74
  20. 5.12
  21. 0.222
  22. 24.8
  23. 88.8
  24. 31.82
  25. 0.153
  26. 1.96
  27. 202.4
  28. 0.231
  29. 0.578
  30. 0.048
  31. 2.28
  32. 7.83
  33. 0.225
  34. 47.5
  35. 0.672
  36. 1.008
  37. 3.15
  38. 3.96
  39. 37.92
  40. 0.455

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