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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 70 · 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. 1.0.23 × 8 — where does the decimal point go? (a) 1.84 (b) 0.184 (c) 18.4 (d) 0.0184
  2. 2.8.4 × 3.9 — where does the decimal point go? (a) 3.276 (b) 327.6 (c) 0.3276 (d) 32.76
  3. 3.3.7 × 1.5 — where does the decimal point go? (a) 5.55 (b) 55.5 (c) 0.555 (d) 0.0555
  4. 4.0.23 × 33 — where does the decimal point go? (a) 7.59 (b) 0.0759 (c) 75.9 (d) 0.759
  5. 5.3.2 × 1.4 — where does the decimal point go? (a) 4.48 (b) 0.0448 (c) 0.448 (d) 44.8
  6. 6.9.3 × 1.2 — where does the decimal point go? (a) 1.116 (b) 0.1116 (c) 111.6 (d) 11.16
  7. 7.8.2 × 0.2 — where does the decimal point go? (a) 0.164 (b) 16.4 (c) 1.64 (d) 0.0164
  8. 8.4.4 × 3.4 — where does the decimal point go? (a) 149.6 (b) 14.96 (c) 1.496 (d) 0.1496
  9. 9.0.34 × 21 — where does the decimal point go? (a) 0.714 (b) 71.4 (c) 7.14 (d) 0.0714
  10. 10.8.1 × 4.7 — where does the decimal point go? (a) 380.7 (b) 0.3807 (c) 38.07 (d) 3.807
  11. 11.0.83 × 0.8 — where does the decimal point go? (a) 0.00664 (b) 0.0664 (c) 6.64 (d) 0.664
  12. 12.0.26 × 49 — where does the decimal point go? (a) 1.274 (b) 0.1274 (c) 12.74 (d) 127.4
  13. 13.9.8 × 0.9 — where does the decimal point go? (a) 88.2 (b) 8.82 (c) 0.0882 (d) 0.882
  14. 14.0.59 × 2.5 — where does the decimal point go? (a) 0.01475 (b) 14.75 (c) 1.475 (d) 0.1475
  15. 15.6.9 × 5 — where does the decimal point go? (a) 34.5 (b) 3.45 (c) 0.345 (d) 345
  16. 16.0.52 × 46 — where does the decimal point go? (a) 239.2 (b) 2.392 (c) 0.2392 (d) 23.92
  17. 17.4.6 × 48 — where does the decimal point go? (a) 2.208 (b) 2208 (c) 22.08 (d) 220.8
  18. 18.8.4 × 0.7 — where does the decimal point go? (a) 0.588 (b) 5.88 (c) 0.0588 (d) 58.8
  19. 19.0.47 × 2 — where does the decimal point go? (a) 0.0094 (b) 0.094 (c) 0.94 (d) 9.4
  20. 20.9.7 × 45 — where does the decimal point go? (a) 436.5 (b) 4.365 (c) 43.65 (d) 4365
  21. 21.9.9 × 0.3 — where does the decimal point go? (a) 2.97 (b) 0.0297 (c) 29.7 (d) 0.297
  22. 22.0.51 × 4.4 — where does the decimal point go? (a) 22.44 (b) 2.244 (c) 0.02244 (d) 0.2244
  23. 23.4.4 × 0.2 — where does the decimal point go? (a) 0.088 (b) 0.0088 (c) 8.8 (d) 0.88
  24. 24.1.7 × 9 — where does the decimal point go? (a) 1.53 (b) 15.3 (c) 0.153 (d) 153
  25. 25.7.8 × 1.7 — where does the decimal point go? (a) 1.326 (b) 0.1326 (c) 13.26 (d) 132.6
  26. 26.0.89 × 0.4 — where does the decimal point go? (a) 0.356 (b) 3.56 (c) 0.00356 (d) 0.0356
  27. 27.0.94 × 1.6 — where does the decimal point go? (a) 15.04 (b) 0.01504 (c) 0.1504 (d) 1.504
  28. 28.0.19 × 0.9 — where does the decimal point go? (a) 0.0171 (b) 0.00171 (c) 0.171 (d) 1.71
  29. 29.1.5 × 3 — where does the decimal point go? (a) 0.045 (b) 45 (c) 4.5 (d) 0.45
  30. 30.0.71 × 3 — where does the decimal point go? (a) 21.3 (b) 2.13 (c) 0.213 (d) 0.0213
  31. 31.0.94 × 0.8 — where does the decimal point go? (a) 0.752 (b) 7.52 (c) 0.0752 (d) 0.00752
  32. 32.6.2 × 9 — where does the decimal point go? (a) 55.8 (b) 0.558 (c) 5.58 (d) 558
  33. 33.5.2 × 6 — where does the decimal point go? (a) 312 (b) 31.2 (c) 3.12 (d) 0.312
  34. 34.0.22 × 42 — where does the decimal point go? (a) 0.0924 (b) 0.924 (c) 92.4 (d) 9.24
  35. 35.1.3 × 45 — where does the decimal point go? (a) 0.585 (b) 585 (c) 58.5 (d) 5.85
  36. 36.1.2 × 0.2 — where does the decimal point go? (a) 0.0024 (b) 0.24 (c) 0.024 (d) 2.4
  37. 37.0.85 × 3.9 — where does the decimal point go? (a) 0.3315 (b) 33.15 (c) 3.315 (d) 0.03315
  38. 38.4.7 × 0.5 — where does the decimal point go? (a) 0.0235 (b) 2.35 (c) 23.5 (d) 0.235
  39. 39.0.99 × 33 — where does the decimal point go? (a) 0.3267 (b) 32.67 (c) 326.7 (d) 3.267
  40. 40.0.45 × 9 — where does the decimal point go? (a) 0.0405 (b) 4.05 (c) 40.5 (d) 0.405

Answer key

  1. 1.84
  2. 32.76
  3. 5.55
  4. 7.59
  5. 4.48
  6. 11.16
  7. 1.64
  8. 14.96
  9. 7.14
  10. 38.07
  11. 0.664
  12. 12.74
  13. 8.82
  14. 1.475
  15. 34.5
  16. 23.92
  17. 220.8
  18. 5.88
  19. 0.94
  20. 436.5
  21. 2.97
  22. 2.244
  23. 0.88
  24. 15.3
  25. 13.26
  26. 0.356
  27. 1.504
  28. 0.171
  29. 4.5
  30. 2.13
  31. 0.752
  32. 55.8
  33. 31.2
  34. 9.24
  35. 58.5
  36. 0.24
  37. 3.315
  38. 2.35
  39. 32.67
  40. 4.05

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