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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 84 · 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. 1.3.2 × 0.8 — where does the decimal point go? (a) 25.6 (b) 2.56 (c) 0.0256 (d) 0.256
  2. 2.0.53 × 34 — where does the decimal point go? (a) 0.1802 (b) 18.02 (c) 180.2 (d) 1.802
  3. 3.0.19 × 26 — where does the decimal point go? (a) 0.0494 (b) 0.494 (c) 4.94 (d) 49.4
  4. 4.0.49 × 1.4 — where does the decimal point go? (a) 0.00686 (b) 0.0686 (c) 0.686 (d) 6.86
  5. 5.9.9 × 43 — where does the decimal point go? (a) 4.257 (b) 4257 (c) 425.7 (d) 42.57
  6. 6.0.44 × 8 — where does the decimal point go? (a) 0.352 (b) 0.0352 (c) 3.52 (d) 35.2
  7. 7.9.1 × 4 — where does the decimal point go? (a) 36.4 (b) 3.64 (c) 364 (d) 0.364
  8. 8.7.3 × 7 — where does the decimal point go? (a) 511 (b) 51.1 (c) 5.11 (d) 0.511
  9. 9.0.78 × 44 — where does the decimal point go? (a) 34.32 (b) 0.3432 (c) 343.2 (d) 3.432
  10. 10.0.21 × 0.4 — where does the decimal point go? (a) 0.0084 (b) 0.084 (c) 0.84 (d) 0.00084
  11. 11.0.67 × 11 — where does the decimal point go? (a) 73.7 (b) 0.0737 (c) 0.737 (d) 7.37
  12. 12.4.1 × 7 — where does the decimal point go? (a) 0.287 (b) 28.7 (c) 287 (d) 2.87
  13. 13.0.51 × 0.8 — where does the decimal point go? (a) 4.08 (b) 0.00408 (c) 0.0408 (d) 0.408
  14. 14.8.1 × 0.3 — where does the decimal point go? (a) 24.3 (b) 2.43 (c) 0.243 (d) 0.0243
  15. 15.0.72 × 0.4 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 0.00288 (d) 2.88
  16. 16.6.6 × 2.3 — where does the decimal point go? (a) 15.18 (b) 1.518 (c) 151.8 (d) 0.1518
  17. 17.4.9 × 2.7 — where does the decimal point go? (a) 0.1323 (b) 13.23 (c) 132.3 (d) 1.323
  18. 18.2.9 × 33 — where does the decimal point go? (a) 0.957 (b) 957 (c) 9.57 (d) 95.7
  19. 19.8.8 × 23 — where does the decimal point go? (a) 202.4 (b) 2.024 (c) 2024 (d) 20.24
  20. 20.2.2 × 7 — where does the decimal point go? (a) 1.54 (b) 15.4 (c) 154 (d) 0.154
  21. 21.4.5 × 9 — where does the decimal point go? (a) 40.5 (b) 4.05 (c) 405 (d) 0.405
  22. 22.9.1 × 12 — where does the decimal point go? (a) 109.2 (b) 1.092 (c) 1092 (d) 10.92
  23. 23.3.1 × 38 — where does the decimal point go? (a) 117.8 (b) 1178 (c) 11.78 (d) 1.178
  24. 24.3.5 × 25 — where does the decimal point go? (a) 87.5 (b) 8.75 (c) 0.875 (d) 875
  25. 25.0.68 × 11 — where does the decimal point go? (a) 7.48 (b) 74.8 (c) 0.748 (d) 0.0748
  26. 26.0.38 × 0.9 — where does the decimal point go? (a) 3.42 (b) 0.342 (c) 0.0342 (d) 0.00342
  27. 27.6.5 × 3 — where does the decimal point go? (a) 195 (b) 1.95 (c) 19.5 (d) 0.195
  28. 28.0.32 × 0.8 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 0.00256 (d) 0.0256
  29. 29.0.19 × 34 — where does the decimal point go? (a) 0.646 (b) 64.6 (c) 0.0646 (d) 6.46
  30. 30.0.44 × 0.6 — where does the decimal point go? (a) 0.0264 (b) 0.00264 (c) 2.64 (d) 0.264
  31. 31.7.8 × 28 — where does the decimal point go? (a) 21.84 (b) 2184 (c) 2.184 (d) 218.4
  32. 32.1.7 × 1.3 — where does the decimal point go? (a) 0.221 (b) 0.0221 (c) 2.21 (d) 22.1
  33. 33.0.24 × 1.3 — where does the decimal point go? (a) 3.12 (b) 0.0312 (c) 0.00312 (d) 0.312
  34. 34.8.9 × 0.2 — where does the decimal point go? (a) 17.8 (b) 1.78 (c) 0.0178 (d) 0.178
  35. 35.0.93 × 0.8 — where does the decimal point go? (a) 0.00744 (b) 0.744 (c) 0.0744 (d) 7.44
  36. 36.0.71 × 0.3 — where does the decimal point go? (a) 0.00213 (b) 2.13 (c) 0.0213 (d) 0.213
  37. 37.0.39 × 2.4 — where does the decimal point go? (a) 0.936 (b) 0.00936 (c) 9.36 (d) 0.0936
  38. 38.0.55 × 5 — where does the decimal point go? (a) 2.75 (b) 0.0275 (c) 27.5 (d) 0.275
  39. 39.7.8 × 8 — where does the decimal point go? (a) 0.624 (b) 62.4 (c) 624 (d) 6.24
  40. 40.9.9 × 11 — where does the decimal point go? (a) 108.9 (b) 1.089 (c) 1089 (d) 10.89

Answer key

  1. 2.56
  2. 18.02
  3. 4.94
  4. 0.686
  5. 425.7
  6. 3.52
  7. 36.4
  8. 51.1
  9. 34.32
  10. 0.084
  11. 7.37
  12. 28.7
  13. 0.408
  14. 2.43
  15. 0.288
  16. 15.18
  17. 13.23
  18. 95.7
  19. 202.4
  20. 15.4
  21. 40.5
  22. 109.2
  23. 117.8
  24. 87.5
  25. 7.48
  26. 0.342
  27. 19.5
  28. 0.256
  29. 6.46
  30. 0.264
  31. 218.4
  32. 2.21
  33. 0.312
  34. 1.78
  35. 0.744
  36. 0.213
  37. 0.936
  38. 2.75
  39. 62.4
  40. 108.9

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