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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 462 · 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. 1.0.53 × 8 — where does the decimal point go? (a) 0.424 (b) 4.24 (c) 42.4 (d) 0.0424
  2. 2.0.63 × 0.3 — where does the decimal point go? (a) 0.189 (b) 0.00189 (c) 1.89 (d) 0.0189
  3. 3.3.1 × 39 — where does the decimal point go? (a) 120.9 (b) 1.209 (c) 12.09 (d) 1209
  4. 4.5.8 × 0.2 — where does the decimal point go? (a) 1.16 (b) 0.116 (c) 0.0116 (d) 11.6
  5. 5.4.8 × 7 — where does the decimal point go? (a) 0.336 (b) 336 (c) 3.36 (d) 33.6
  6. 6.0.87 × 3.2 — where does the decimal point go? (a) 27.84 (b) 0.2784 (c) 0.02784 (d) 2.784
  7. 7.0.98 × 0.3 — where does the decimal point go? (a) 0.00294 (b) 0.294 (c) 0.0294 (d) 2.94
  8. 8.6.2 × 13 — where does the decimal point go? (a) 8.06 (b) 806 (c) 0.806 (d) 80.6
  9. 9.9.3 × 0.6 — where does the decimal point go? (a) 0.558 (b) 0.0558 (c) 5.58 (d) 55.8
  10. 10.0.64 × 0.3 — where does the decimal point go? (a) 0.192 (b) 0.00192 (c) 1.92 (d) 0.0192
  11. 11.9.9 × 0.8 — where does the decimal point go? (a) 0.0792 (b) 0.792 (c) 7.92 (d) 79.2
  12. 12.8.2 × 4.1 — where does the decimal point go? (a) 336.2 (b) 33.62 (c) 0.3362 (d) 3.362
  13. 13.0.81 × 9 — where does the decimal point go? (a) 0.729 (b) 72.9 (c) 7.29 (d) 0.0729
  14. 14.0.94 × 4.7 — where does the decimal point go? (a) 4.418 (b) 0.04418 (c) 44.18 (d) 0.4418
  15. 15.4.1 × 4 — where does the decimal point go? (a) 16.4 (b) 0.164 (c) 164 (d) 1.64
  16. 16.0.32 × 0.2 — where does the decimal point go? (a) 0.064 (b) 0.0064 (c) 0.00064 (d) 0.64
  17. 17.0.13 × 41 — where does the decimal point go? (a) 5.33 (b) 0.533 (c) 0.0533 (d) 53.3
  18. 18.0.69 × 0.8 — where does the decimal point go? (a) 5.52 (b) 0.0552 (c) 0.00552 (d) 0.552
  19. 19.6.3 × 15 — where does the decimal point go? (a) 9.45 (b) 94.5 (c) 0.945 (d) 945
  20. 20.0.74 × 0.4 — where does the decimal point go? (a) 0.296 (b) 0.00296 (c) 2.96 (d) 0.0296
  21. 21.6.8 × 4 — where does the decimal point go? (a) 0.272 (b) 27.2 (c) 272 (d) 2.72
  22. 22.0.44 × 28 — where does the decimal point go? (a) 12.32 (b) 0.1232 (c) 1.232 (d) 123.2
  23. 23.9.9 × 3.5 — where does the decimal point go? (a) 34.65 (b) 346.5 (c) 3.465 (d) 0.3465
  24. 24.5.9 × 0.4 — where does the decimal point go? (a) 2.36 (b) 0.0236 (c) 0.236 (d) 23.6
  25. 25.7.3 × 2 — where does the decimal point go? (a) 0.146 (b) 1.46 (c) 146 (d) 14.6
  26. 26.0.27 × 0.2 — where does the decimal point go? (a) 0.00054 (b) 0.054 (c) 0.0054 (d) 0.54
  27. 27.2.6 × 8 — where does the decimal point go? (a) 20.8 (b) 208 (c) 2.08 (d) 0.208
  28. 28.0.66 × 36 — where does the decimal point go? (a) 237.6 (b) 23.76 (c) 0.2376 (d) 2.376
  29. 29.0.83 × 3 — where does the decimal point go? (a) 2.49 (b) 24.9 (c) 0.0249 (d) 0.249
  30. 30.3.9 × 0.7 — where does the decimal point go? (a) 2.73 (b) 0.273 (c) 27.3 (d) 0.0273
  31. 31.0.17 × 3.4 — where does the decimal point go? (a) 0.0578 (b) 0.00578 (c) 5.78 (d) 0.578
  32. 32.0.57 × 0.2 — where does the decimal point go? (a) 0.00114 (b) 1.14 (c) 0.114 (d) 0.0114
  33. 33.0.44 × 2 — where does the decimal point go? (a) 0.88 (b) 8.8 (c) 0.0088 (d) 0.088
  34. 34.9.6 × 16 — where does the decimal point go? (a) 153.6 (b) 15.36 (c) 1.536 (d) 1536
  35. 35.0.19 × 4.9 — where does the decimal point go? (a) 0.00931 (b) 0.0931 (c) 0.931 (d) 9.31
  36. 36.1.6 × 0.2 — where does the decimal point go? (a) 0.032 (b) 3.2 (c) 0.0032 (d) 0.32
  37. 37.0.26 × 3.2 — where does the decimal point go? (a) 0.0832 (b) 8.32 (c) 0.00832 (d) 0.832
  38. 38.0.97 × 4.9 — where does the decimal point go? (a) 4.753 (b) 0.4753 (c) 0.04753 (d) 47.53
  39. 39.4.1 × 0.5 — where does the decimal point go? (a) 20.5 (b) 0.0205 (c) 2.05 (d) 0.205
  40. 40.0.89 × 0.9 — where does the decimal point go? (a) 0.0801 (b) 8.01 (c) 0.801 (d) 0.00801

Answer key

  1. 4.24
  2. 0.189
  3. 120.9
  4. 1.16
  5. 33.6
  6. 2.784
  7. 0.294
  8. 80.6
  9. 5.58
  10. 0.192
  11. 7.92
  12. 33.62
  13. 7.29
  14. 4.418
  15. 16.4
  16. 0.064
  17. 5.33
  18. 0.552
  19. 94.5
  20. 0.296
  21. 27.2
  22. 12.32
  23. 34.65
  24. 2.36
  25. 14.6
  26. 0.054
  27. 20.8
  28. 23.76
  29. 2.49
  30. 2.73
  31. 0.578
  32. 0.114
  33. 0.88
  34. 153.6
  35. 0.931
  36. 0.32
  37. 0.832
  38. 4.753
  39. 2.05
  40. 0.801

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