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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 454 · 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. 1.5.4 × 3 — where does the decimal point go? (a) 0.162 (b) 16.2 (c) 1.62 (d) 162
  2. 2.3.1 × 3.7 — where does the decimal point go? (a) 0.1147 (b) 1.147 (c) 114.7 (d) 11.47
  3. 3.2.7 × 18 — where does the decimal point go? (a) 0.486 (b) 4.86 (c) 48.6 (d) 486
  4. 4.7.1 × 6 — where does the decimal point go? (a) 0.426 (b) 426 (c) 4.26 (d) 42.6
  5. 5.9.2 × 6 — where does the decimal point go? (a) 0.552 (b) 55.2 (c) 552 (d) 5.52
  6. 6.8.2 × 9 — where does the decimal point go? (a) 7.38 (b) 0.738 (c) 73.8 (d) 738
  7. 7.0.65 × 49 — where does the decimal point go? (a) 31.85 (b) 3.185 (c) 318.5 (d) 0.3185
  8. 8.0.68 × 49 — where does the decimal point go? (a) 0.3332 (b) 33.32 (c) 333.2 (d) 3.332
  9. 9.7.8 × 33 — where does the decimal point go? (a) 257.4 (b) 2.574 (c) 25.74 (d) 2574
  10. 10.0.19 × 9 — where does the decimal point go? (a) 0.171 (b) 17.1 (c) 1.71 (d) 0.0171
  11. 11.1.7 × 21 — where does the decimal point go? (a) 35.7 (b) 0.357 (c) 357 (d) 3.57
  12. 12.2.3 × 6 — where does the decimal point go? (a) 1.38 (b) 13.8 (c) 0.138 (d) 138
  13. 13.7.4 × 2.2 — where does the decimal point go? (a) 1.628 (b) 162.8 (c) 16.28 (d) 0.1628
  14. 14.8.6 × 0.4 — where does the decimal point go? (a) 0.344 (b) 34.4 (c) 0.0344 (d) 3.44
  15. 15.0.68 × 2.7 — where does the decimal point go? (a) 0.01836 (b) 18.36 (c) 0.1836 (d) 1.836
  16. 16.2.2 × 0.7 — where does the decimal point go? (a) 0.154 (b) 15.4 (c) 1.54 (d) 0.0154
  17. 17.0.66 × 0.9 — where does the decimal point go? (a) 0.00594 (b) 0.594 (c) 0.0594 (d) 5.94
  18. 18.3.2 × 28 — where does the decimal point go? (a) 896 (b) 0.896 (c) 89.6 (d) 8.96
  19. 19.0.85 × 49 — where does the decimal point go? (a) 0.4165 (b) 4.165 (c) 41.65 (d) 416.5
  20. 20.0.97 × 18 — where does the decimal point go? (a) 17.46 (b) 0.1746 (c) 174.6 (d) 1.746
  21. 21.0.31 × 0.8 — where does the decimal point go? (a) 0.0248 (b) 0.248 (c) 0.00248 (d) 2.48
  22. 22.3.2 × 0.9 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.0288 (d) 28.8
  23. 23.0.62 × 0.4 — where does the decimal point go? (a) 0.00248 (b) 0.0248 (c) 0.248 (d) 2.48
  24. 24.0.37 × 0.4 — where does the decimal point go? (a) 1.48 (b) 0.0148 (c) 0.00148 (d) 0.148
  25. 25.0.58 × 0.2 — where does the decimal point go? (a) 0.116 (b) 0.00116 (c) 0.0116 (d) 1.16
  26. 26.6.9 × 0.5 — where does the decimal point go? (a) 0.0345 (b) 3.45 (c) 0.345 (d) 34.5
  27. 27.0.79 × 2.7 — where does the decimal point go? (a) 0.2133 (b) 0.02133 (c) 21.33 (d) 2.133
  28. 28.0.26 × 23 — where does the decimal point go? (a) 0.0598 (b) 5.98 (c) 0.598 (d) 59.8
  29. 29.7.9 × 0.3 — where does the decimal point go? (a) 2.37 (b) 23.7 (c) 0.0237 (d) 0.237
  30. 30.0.84 × 7 — where does the decimal point go? (a) 0.588 (b) 58.8 (c) 0.0588 (d) 5.88
  31. 31.8.6 × 0.8 — where does the decimal point go? (a) 0.688 (b) 6.88 (c) 68.8 (d) 0.0688
  32. 32.0.73 × 49 — where does the decimal point go? (a) 3.577 (b) 35.77 (c) 357.7 (d) 0.3577
  33. 33.0.43 × 6 — where does the decimal point go? (a) 2.58 (b) 0.258 (c) 0.0258 (d) 25.8
  34. 34.5.6 × 3.1 — where does the decimal point go? (a) 0.1736 (b) 1.736 (c) 173.6 (d) 17.36
  35. 35.0.92 × 4 — where does the decimal point go? (a) 3.68 (b) 36.8 (c) 0.0368 (d) 0.368
  36. 36.0.59 × 6 — where does the decimal point go? (a) 35.4 (b) 3.54 (c) 0.354 (d) 0.0354
  37. 37.2.6 × 46 — where does the decimal point go? (a) 119.6 (b) 1196 (c) 1.196 (d) 11.96
  38. 38.0.99 × 7 — where does the decimal point go? (a) 69.3 (b) 0.693 (c) 0.0693 (d) 6.93
  39. 39.0.24 × 6 — where does the decimal point go? (a) 0.144 (b) 0.0144 (c) 1.44 (d) 14.4
  40. 40.8.9 × 21 — where does the decimal point go? (a) 18.69 (b) 186.9 (c) 1869 (d) 1.869

Answer key

  1. 16.2
  2. 11.47
  3. 48.6
  4. 42.6
  5. 55.2
  6. 73.8
  7. 31.85
  8. 33.32
  9. 257.4
  10. 1.71
  11. 35.7
  12. 13.8
  13. 16.28
  14. 3.44
  15. 1.836
  16. 1.54
  17. 0.594
  18. 89.6
  19. 41.65
  20. 17.46
  21. 0.248
  22. 2.88
  23. 0.248
  24. 0.148
  25. 0.116
  26. 3.45
  27. 2.133
  28. 5.98
  29. 2.37
  30. 5.88
  31. 6.88
  32. 35.77
  33. 2.58
  34. 17.36
  35. 3.68
  36. 3.54
  37. 119.6
  38. 6.93
  39. 1.44
  40. 186.9

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