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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 354 · 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. 1.0.21 × 8 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 0.0168
  2. 2.3.7 × 8 — where does the decimal point go? (a) 296 (b) 0.296 (c) 2.96 (d) 29.6
  3. 3.0.61 × 4.8 — where does the decimal point go? (a) 0.02928 (b) 2.928 (c) 29.28 (d) 0.2928
  4. 4.0.75 × 3.5 — where does the decimal point go? (a) 0.2625 (b) 2.625 (c) 0.02625 (d) 26.25
  5. 5.0.94 × 1.2 — where does the decimal point go? (a) 1.128 (b) 11.28 (c) 0.01128 (d) 0.1128
  6. 6.7.8 × 17 — where does the decimal point go? (a) 13.26 (b) 132.6 (c) 1326 (d) 1.326
  7. 7.2.4 × 9 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 216
  8. 8.0.91 × 7 — where does the decimal point go? (a) 0.0637 (b) 63.7 (c) 0.637 (d) 6.37
  9. 9.0.13 × 1.5 — where does the decimal point go? (a) 0.0195 (b) 0.195 (c) 0.00195 (d) 1.95
  10. 10.5.5 × 49 — where does the decimal point go? (a) 269.5 (b) 2.695 (c) 2695 (d) 26.95
  11. 11.8.1 × 0.7 — where does the decimal point go? (a) 0.0567 (b) 5.67 (c) 0.567 (d) 56.7
  12. 12.8.7 × 4.9 — where does the decimal point go? (a) 42.63 (b) 426.3 (c) 4.263 (d) 0.4263
  13. 13.9.8 × 3 — where does the decimal point go? (a) 29.4 (b) 2.94 (c) 294 (d) 0.294
  14. 14.0.78 × 0.9 — where does the decimal point go? (a) 0.0702 (b) 0.702 (c) 0.00702 (d) 7.02
  15. 15.0.94 × 9 — where does the decimal point go? (a) 0.0846 (b) 84.6 (c) 0.846 (d) 8.46
  16. 16.2.4 × 4.8 — where does the decimal point go? (a) 0.1152 (b) 1.152 (c) 115.2 (d) 11.52
  17. 17.2.6 × 9 — where does the decimal point go? (a) 23.4 (b) 0.234 (c) 2.34 (d) 234
  18. 18.0.61 × 4.5 — where does the decimal point go? (a) 0.2745 (b) 2.745 (c) 27.45 (d) 0.02745
  19. 19.5.4 × 1.8 — where does the decimal point go? (a) 9.72 (b) 97.2 (c) 0.972 (d) 0.0972
  20. 20.9.2 × 4 — where does the decimal point go? (a) 36.8 (b) 0.368 (c) 3.68 (d) 368
  21. 21.5.1 × 0.4 — where does the decimal point go? (a) 2.04 (b) 0.0204 (c) 0.204 (d) 20.4
  22. 22.3.9 × 17 — where does the decimal point go? (a) 0.663 (b) 66.3 (c) 663 (d) 6.63
  23. 23.9.3 × 0.6 — where does the decimal point go? (a) 55.8 (b) 5.58 (c) 0.558 (d) 0.0558
  24. 24.0.97 × 4.9 — where does the decimal point go? (a) 0.4753 (b) 4.753 (c) 47.53 (d) 0.04753
  25. 25.9.3 × 2 — where does the decimal point go? (a) 1.86 (b) 18.6 (c) 0.186 (d) 186
  26. 26.0.74 × 3 — where does the decimal point go? (a) 0.0222 (b) 0.222 (c) 22.2 (d) 2.22
  27. 27.7.7 × 8 — where does the decimal point go? (a) 616 (b) 0.616 (c) 6.16 (d) 61.6
  28. 28.3.4 × 0.3 — where does the decimal point go? (a) 1.02 (b) 0.0102 (c) 10.2 (d) 0.102
  29. 29.0.87 × 5 — where does the decimal point go? (a) 0.435 (b) 4.35 (c) 43.5 (d) 0.0435
  30. 30.0.17 × 0.8 — where does the decimal point go? (a) 0.0136 (b) 0.136 (c) 0.00136 (d) 1.36
  31. 31.2.7 × 31 — where does the decimal point go? (a) 8.37 (b) 83.7 (c) 0.837 (d) 837
  32. 32.9.9 × 0.7 — where does the decimal point go? (a) 0.0693 (b) 69.3 (c) 6.93 (d) 0.693
  33. 33.0.61 × 8 — where does the decimal point go? (a) 0.0488 (b) 4.88 (c) 48.8 (d) 0.488
  34. 34.0.84 × 12 — where does the decimal point go? (a) 10.08 (b) 1.008 (c) 0.1008 (d) 100.8
  35. 35.4.7 × 16 — where does the decimal point go? (a) 0.752 (b) 7.52 (c) 75.2 (d) 752
  36. 36.0.16 × 3 — where does the decimal point go? (a) 0.48 (b) 0.048 (c) 0.0048 (d) 4.8
  37. 37.0.94 × 1.7 — where does the decimal point go? (a) 0.1598 (b) 15.98 (c) 0.01598 (d) 1.598
  38. 38.0.89 × 0.4 — where does the decimal point go? (a) 0.00356 (b) 3.56 (c) 0.0356 (d) 0.356
  39. 39.7.1 × 3 — where does the decimal point go? (a) 0.213 (b) 21.3 (c) 213 (d) 2.13
  40. 40.5.6 × 3.3 — where does the decimal point go? (a) 0.1848 (b) 18.48 (c) 1.848 (d) 184.8

Answer key

  1. 1.68
  2. 29.6
  3. 2.928
  4. 2.625
  5. 1.128
  6. 132.6
  7. 21.6
  8. 6.37
  9. 0.195
  10. 269.5
  11. 5.67
  12. 42.63
  13. 29.4
  14. 0.702
  15. 8.46
  16. 11.52
  17. 23.4
  18. 2.745
  19. 9.72
  20. 36.8
  21. 2.04
  22. 66.3
  23. 5.58
  24. 4.753
  25. 18.6
  26. 2.22
  27. 61.6
  28. 1.02
  29. 4.35
  30. 0.136
  31. 83.7
  32. 6.93
  33. 4.88
  34. 10.08
  35. 75.2
  36. 0.48
  37. 1.598
  38. 0.356
  39. 21.3
  40. 18.48

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