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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 5 · 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. 1.3.9 × 0.5 — where does the decimal point go? (a) 1.95 (b) 0.0195 (c) 0.195 (d) 19.5
  2. 2.4.9 × 0.9 — where does the decimal point go? (a) 44.1 (b) 0.441 (c) 0.0441 (d) 4.41
  3. 3.0.97 × 11 — where does the decimal point go? (a) 0.1067 (b) 1.067 (c) 106.7 (d) 10.67
  4. 4.0.68 × 12 — where does the decimal point go? (a) 0.816 (b) 0.0816 (c) 8.16 (d) 81.6
  5. 5.6.8 × 2.8 — where does the decimal point go? (a) 1.904 (b) 19.04 (c) 190.4 (d) 0.1904
  6. 6.0.26 × 6 — where does the decimal point go? (a) 15.6 (b) 0.156 (c) 1.56 (d) 0.0156
  7. 7.9.8 × 6 — where does the decimal point go? (a) 588 (b) 5.88 (c) 58.8 (d) 0.588
  8. 8.0.51 × 3.7 — where does the decimal point go? (a) 0.01887 (b) 1.887 (c) 18.87 (d) 0.1887
  9. 9.9.3 × 0.3 — where does the decimal point go? (a) 0.0279 (b) 2.79 (c) 0.279 (d) 27.9
  10. 10.0.36 × 0.3 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 0.00108 (d) 1.08
  11. 11.0.74 × 12 — where does the decimal point go? (a) 0.0888 (b) 0.888 (c) 8.88 (d) 88.8
  12. 12.9.9 × 0.3 — where does the decimal point go? (a) 0.297 (b) 2.97 (c) 29.7 (d) 0.0297
  13. 13.0.17 × 0.3 — where does the decimal point go? (a) 0.00051 (b) 0.051 (c) 0.0051 (d) 0.51
  14. 14.9.1 × 2.9 — where does the decimal point go? (a) 263.9 (b) 0.2639 (c) 2.639 (d) 26.39
  15. 15.2.7 × 1.8 — where does the decimal point go? (a) 0.0486 (b) 48.6 (c) 4.86 (d) 0.486
  16. 16.7.4 × 6 — where does the decimal point go? (a) 44.4 (b) 4.44 (c) 0.444 (d) 444
  17. 17.0.87 × 3.5 — where does the decimal point go? (a) 30.45 (b) 0.3045 (c) 3.045 (d) 0.03045
  18. 18.8.1 × 4 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 324 (d) 3.24
  19. 19.7.4 × 9 — where does the decimal point go? (a) 6.66 (b) 66.6 (c) 0.666 (d) 666
  20. 20.1.6 × 4 — where does the decimal point go? (a) 6.4 (b) 64 (c) 0.64 (d) 0.064
  21. 21.0.95 × 2.5 — where does the decimal point go? (a) 0.02375 (b) 23.75 (c) 0.2375 (d) 2.375
  22. 22.0.61 × 8 — where does the decimal point go? (a) 0.488 (b) 0.0488 (c) 48.8 (d) 4.88
  23. 23.2.1 × 0.8 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 16.8 (d) 0.0168
  24. 24.6.3 × 2 — where does the decimal point go? (a) 126 (b) 0.126 (c) 12.6 (d) 1.26
  25. 25.9.3 × 3 — where does the decimal point go? (a) 279 (b) 2.79 (c) 0.279 (d) 27.9
  26. 26.1.3 × 2.9 — where does the decimal point go? (a) 37.7 (b) 0.0377 (c) 0.377 (d) 3.77
  27. 27.0.16 × 44 — where does the decimal point go? (a) 0.0704 (b) 70.4 (c) 0.704 (d) 7.04
  28. 28.3.3 × 0.3 — where does the decimal point go? (a) 0.99 (b) 0.0099 (c) 9.9 (d) 0.099
  29. 29.0.71 × 4.8 — where does the decimal point go? (a) 3.408 (b) 0.03408 (c) 34.08 (d) 0.3408
  30. 30.0.56 × 2.1 — where does the decimal point go? (a) 0.1176 (b) 0.01176 (c) 11.76 (d) 1.176
  31. 31.0.59 × 1.3 — where does the decimal point go? (a) 0.00767 (b) 7.67 (c) 0.0767 (d) 0.767
  32. 32.0.73 × 0.8 — where does the decimal point go? (a) 5.84 (b) 0.0584 (c) 0.584 (d) 0.00584
  33. 33.7.7 × 0.5 — where does the decimal point go? (a) 3.85 (b) 0.385 (c) 38.5 (d) 0.0385
  34. 34.9.9 × 9 — where does the decimal point go? (a) 891 (b) 89.1 (c) 0.891 (d) 8.91
  35. 35.7.4 × 0.6 — where does the decimal point go? (a) 4.44 (b) 0.0444 (c) 0.444 (d) 44.4
  36. 36.0.46 × 49 — where does the decimal point go? (a) 0.2254 (b) 2.254 (c) 22.54 (d) 225.4
  37. 37.5.4 × 8 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 432 (d) 4.32
  38. 38.0.89 × 12 — where does the decimal point go? (a) 1.068 (b) 0.1068 (c) 106.8 (d) 10.68
  39. 39.0.27 × 13 — where does the decimal point go? (a) 3.51 (b) 0.351 (c) 0.0351 (d) 35.1
  40. 40.8.1 × 2 — where does the decimal point go? (a) 1.62 (b) 16.2 (c) 0.162 (d) 162

Answer key

  1. 1.95
  2. 4.41
  3. 10.67
  4. 8.16
  5. 19.04
  6. 1.56
  7. 58.8
  8. 1.887
  9. 2.79
  10. 0.108
  11. 8.88
  12. 2.97
  13. 0.051
  14. 26.39
  15. 4.86
  16. 44.4
  17. 3.045
  18. 32.4
  19. 66.6
  20. 6.4
  21. 2.375
  22. 4.88
  23. 1.68
  24. 12.6
  25. 27.9
  26. 3.77
  27. 7.04
  28. 0.99
  29. 3.408
  30. 1.176
  31. 0.767
  32. 0.584
  33. 3.85
  34. 89.1
  35. 4.44
  36. 22.54
  37. 43.2
  38. 10.68
  39. 3.51
  40. 16.2

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