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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 778 · 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. 1.2.7 × 0.9 — where does the decimal point go? (a) 24.3 (b) 0.0243 (c) 2.43 (d) 0.243
  2. 2.1.6 × 1.6 — where does the decimal point go? (a) 2.56 (b) 25.6 (c) 0.0256 (d) 0.256
  3. 3.0.21 × 1.5 — where does the decimal point go? (a) 0.0315 (b) 3.15 (c) 0.00315 (d) 0.315
  4. 4.0.76 × 2 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 15.2 (d) 0.0152
  5. 5.1.4 × 3.2 — where does the decimal point go? (a) 4.48 (b) 0.448 (c) 44.8 (d) 0.0448
  6. 6.6.8 × 4.6 — where does the decimal point go? (a) 312.8 (b) 0.3128 (c) 31.28 (d) 3.128
  7. 7.2.1 × 4.3 — where does the decimal point go? (a) 9.03 (b) 0.0903 (c) 90.3 (d) 0.903
  8. 8.0.83 × 2 — where does the decimal point go? (a) 1.66 (b) 0.166 (c) 0.0166 (d) 16.6
  9. 9.6.3 × 2 — where does the decimal point go? (a) 0.126 (b) 1.26 (c) 12.6 (d) 126
  10. 10.0.95 × 7 — where does the decimal point go? (a) 6.65 (b) 66.5 (c) 0.0665 (d) 0.665
  11. 11.0.33 × 0.9 — where does the decimal point go? (a) 0.0297 (b) 0.297 (c) 0.00297 (d) 2.97
  12. 12.0.82 × 31 — where does the decimal point go? (a) 25.42 (b) 2.542 (c) 0.2542 (d) 254.2
  13. 13.5.2 × 0.3 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 0.0156 (d) 15.6
  14. 14.5.5 × 0.7 — where does the decimal point go? (a) 0.385 (b) 0.0385 (c) 38.5 (d) 3.85
  15. 15.0.33 × 47 — where does the decimal point go? (a) 0.1551 (b) 155.1 (c) 1.551 (d) 15.51
  16. 16.4.2 × 1.1 — where does the decimal point go? (a) 0.462 (b) 0.0462 (c) 46.2 (d) 4.62
  17. 17.1.4 × 7 — where does the decimal point go? (a) 0.98 (b) 0.098 (c) 98 (d) 9.8
  18. 18.6.1 × 0.2 — where does the decimal point go? (a) 1.22 (b) 0.0122 (c) 12.2 (d) 0.122
  19. 19.5.3 × 0.9 — where does the decimal point go? (a) 47.7 (b) 0.0477 (c) 0.477 (d) 4.77
  20. 20.1.9 × 26 — where does the decimal point go? (a) 0.494 (b) 49.4 (c) 494 (d) 4.94
  21. 21.0.81 × 0.9 — where does the decimal point go? (a) 0.0729 (b) 0.00729 (c) 7.29 (d) 0.729
  22. 22.9.4 × 19 — where does the decimal point go? (a) 1.786 (b) 1786 (c) 17.86 (d) 178.6
  23. 23.6.3 × 5 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 315 (d) 31.5
  24. 24.0.48 × 0.4 — where does the decimal point go? (a) 1.92 (b) 0.00192 (c) 0.192 (d) 0.0192
  25. 25.0.32 × 9 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 28.8 (d) 2.88
  26. 26.0.19 × 43 — where does the decimal point go? (a) 8.17 (b) 0.817 (c) 0.0817 (d) 81.7
  27. 27.2.4 × 0.7 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 0.0168 (d) 16.8
  28. 28.0.22 × 4 — where does the decimal point go? (a) 8.8 (b) 0.0088 (c) 0.88 (d) 0.088
  29. 29.2.3 × 1.4 — where does the decimal point go? (a) 3.22 (b) 0.322 (c) 0.0322 (d) 32.2
  30. 30.4.8 × 33 — where does the decimal point go? (a) 1.584 (b) 15.84 (c) 1584 (d) 158.4
  31. 31.5.6 × 6 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 33.6 (d) 336
  32. 32.9.7 × 7 — where does the decimal point go? (a) 67.9 (b) 0.679 (c) 6.79 (d) 679
  33. 33.8.7 × 0.2 — where does the decimal point go? (a) 0.0174 (b) 17.4 (c) 0.174 (d) 1.74
  34. 34.9.4 × 37 — where does the decimal point go? (a) 3478 (b) 347.8 (c) 3.478 (d) 34.78
  35. 35.7.9 × 0.3 — where does the decimal point go? (a) 0.0237 (b) 23.7 (c) 2.37 (d) 0.237
  36. 36.0.15 × 21 — where does the decimal point go? (a) 0.315 (b) 31.5 (c) 0.0315 (d) 3.15
  37. 37.0.29 × 13 — where does the decimal point go? (a) 0.0377 (b) 37.7 (c) 3.77 (d) 0.377
  38. 38.4.9 × 3 — where does the decimal point go? (a) 1.47 (b) 147 (c) 14.7 (d) 0.147
  39. 39.3.7 × 0.5 — where does the decimal point go? (a) 0.0185 (b) 0.185 (c) 18.5 (d) 1.85
  40. 40.0.22 × 29 — where does the decimal point go? (a) 0.638 (b) 0.0638 (c) 63.8 (d) 6.38

Answer key

  1. 2.43
  2. 2.56
  3. 0.315
  4. 1.52
  5. 4.48
  6. 31.28
  7. 9.03
  8. 1.66
  9. 12.6
  10. 6.65
  11. 0.297
  12. 25.42
  13. 1.56
  14. 3.85
  15. 15.51
  16. 4.62
  17. 9.8
  18. 1.22
  19. 4.77
  20. 49.4
  21. 0.729
  22. 178.6
  23. 31.5
  24. 0.192
  25. 2.88
  26. 8.17
  27. 1.68
  28. 0.88
  29. 3.22
  30. 158.4
  31. 33.6
  32. 67.9
  33. 1.74
  34. 347.8
  35. 2.37
  36. 3.15
  37. 3.77
  38. 14.7
  39. 1.85
  40. 6.38

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