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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 466 · 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. 1.0.58 × 0.3 — where does the decimal point go? (a) 0.0174 (b) 0.174 (c) 1.74 (d) 0.00174
  2. 2.0.48 × 6 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 28.8 (d) 0.0288
  3. 3.2.8 × 0.9 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 2.52 (d) 0.252
  4. 4.0.42 × 46 — where does the decimal point go? (a) 19.32 (b) 0.1932 (c) 1.932 (d) 193.2
  5. 5.0.67 × 3 — where does the decimal point go? (a) 0.0201 (b) 2.01 (c) 20.1 (d) 0.201
  6. 6.9.2 × 9 — where does the decimal point go? (a) 82.8 (b) 8.28 (c) 0.828 (d) 828
  7. 7.2.7 × 0.6 — where does the decimal point go? (a) 1.62 (b) 0.0162 (c) 16.2 (d) 0.162
  8. 8.7.7 × 2 — where does the decimal point go? (a) 0.154 (b) 15.4 (c) 154 (d) 1.54
  9. 9.6.1 × 1.5 — where does the decimal point go? (a) 0.915 (b) 9.15 (c) 91.5 (d) 0.0915
  10. 10.3.6 × 3 — where does the decimal point go? (a) 108 (b) 10.8 (c) 1.08 (d) 0.108
  11. 11.1.9 × 0.3 — where does the decimal point go? (a) 0.57 (b) 5.7 (c) 0.0057 (d) 0.057
  12. 12.5.2 × 43 — where does the decimal point go? (a) 2236 (b) 2.236 (c) 223.6 (d) 22.36
  13. 13.0.43 × 2.3 — where does the decimal point go? (a) 0.989 (b) 9.89 (c) 0.00989 (d) 0.0989
  14. 14.0.18 × 3 — where does the decimal point go? (a) 0.054 (b) 0.0054 (c) 0.54 (d) 5.4
  15. 15.3.2 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 9.6
  16. 16.0.41 × 0.6 — where does the decimal point go? (a) 0.246 (b) 0.0246 (c) 2.46 (d) 0.00246
  17. 17.0.33 × 0.6 — where does the decimal point go? (a) 0.00198 (b) 0.198 (c) 0.0198 (d) 1.98
  18. 18.0.81 × 6 — where does the decimal point go? (a) 4.86 (b) 0.0486 (c) 0.486 (d) 48.6
  19. 19.0.57 × 9 — where does the decimal point go? (a) 5.13 (b) 0.513 (c) 51.3 (d) 0.0513
  20. 20.9.2 × 0.2 — where does the decimal point go? (a) 0.184 (b) 1.84 (c) 0.0184 (d) 18.4
  21. 21.7.4 × 3.7 — where does the decimal point go? (a) 0.2738 (b) 27.38 (c) 2.738 (d) 273.8
  22. 22.8.2 × 1.1 — where does the decimal point go? (a) 90.2 (b) 0.0902 (c) 9.02 (d) 0.902
  23. 23.0.34 × 9 — where does the decimal point go? (a) 0.0306 (b) 0.306 (c) 30.6 (d) 3.06
  24. 24.0.89 × 39 — where does the decimal point go? (a) 347.1 (b) 34.71 (c) 3.471 (d) 0.3471
  25. 25.1.6 × 0.3 — where does the decimal point go? (a) 0.0048 (b) 4.8 (c) 0.48 (d) 0.048
  26. 26.9.6 × 0.4 — where does the decimal point go? (a) 0.384 (b) 3.84 (c) 0.0384 (d) 38.4
  27. 27.0.65 × 7 — where does the decimal point go? (a) 4.55 (b) 0.0455 (c) 45.5 (d) 0.455
  28. 28.2.7 × 2.9 — where does the decimal point go? (a) 78.3 (b) 7.83 (c) 0.0783 (d) 0.783
  29. 29.3.9 × 0.4 — where does the decimal point go? (a) 15.6 (b) 0.0156 (c) 0.156 (d) 1.56
  30. 30.0.44 × 6 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 0.264 (d) 26.4
  31. 31.0.32 × 4.2 — where does the decimal point go? (a) 0.1344 (b) 13.44 (c) 1.344 (d) 0.01344
  32. 32.0.85 × 39 — where does the decimal point go? (a) 0.3315 (b) 331.5 (c) 3.315 (d) 33.15
  33. 33.9.1 × 8 — where does the decimal point go? (a) 0.728 (b) 72.8 (c) 7.28 (d) 728
  34. 34.1.4 × 7 — where does the decimal point go? (a) 0.98 (b) 9.8 (c) 0.098 (d) 98
  35. 35.0.19 × 4.9 — where does the decimal point go? (a) 9.31 (b) 0.0931 (c) 0.00931 (d) 0.931
  36. 36.1.7 × 25 — where does the decimal point go? (a) 4.25 (b) 0.425 (c) 425 (d) 42.5
  37. 37.2.8 × 9 — where does the decimal point go? (a) 0.252 (b) 252 (c) 25.2 (d) 2.52
  38. 38.0.62 × 38 — where does the decimal point go? (a) 0.2356 (b) 2.356 (c) 23.56 (d) 235.6
  39. 39.0.69 × 4.5 — where does the decimal point go? (a) 3.105 (b) 0.3105 (c) 0.03105 (d) 31.05
  40. 40.2.3 × 0.7 — where does the decimal point go? (a) 0.161 (b) 0.0161 (c) 1.61 (d) 16.1

Answer key

  1. 0.174
  2. 2.88
  3. 2.52
  4. 19.32
  5. 2.01
  6. 82.8
  7. 1.62
  8. 15.4
  9. 9.15
  10. 10.8
  11. 0.57
  12. 223.6
  13. 0.989
  14. 0.54
  15. 0.96
  16. 0.246
  17. 0.198
  18. 4.86
  19. 5.13
  20. 1.84
  21. 27.38
  22. 9.02
  23. 3.06
  24. 34.71
  25. 0.48
  26. 3.84
  27. 4.55
  28. 7.83
  29. 1.56
  30. 2.64
  31. 1.344
  32. 33.15
  33. 72.8
  34. 9.8
  35. 0.931
  36. 42.5
  37. 25.2
  38. 23.56
  39. 3.105
  40. 1.61

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