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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 525 · 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. 1.0.12 × 3 — where does the decimal point go? (a) 0.36 (b) 0.0036 (c) 0.036 (d) 3.6
  2. 2.9.7 × 4 — where does the decimal point go? (a) 3.88 (b) 0.388 (c) 38.8 (d) 388
  3. 3.0.67 × 18 — where does the decimal point go? (a) 12.06 (b) 1.206 (c) 0.1206 (d) 120.6
  4. 4.8.2 × 9 — where does the decimal point go? (a) 738 (b) 7.38 (c) 0.738 (d) 73.8
  5. 5.4.6 × 4.4 — where does the decimal point go? (a) 2.024 (b) 0.2024 (c) 20.24 (d) 202.4
  6. 6.0.59 × 0.2 — where does the decimal point go? (a) 0.00118 (b) 1.18 (c) 0.0118 (d) 0.118
  7. 7.8.2 × 3 — where does the decimal point go? (a) 24.6 (b) 2.46 (c) 246 (d) 0.246
  8. 8.0.51 × 0.2 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 0.00102 (d) 0.0102
  9. 9.0.32 × 0.8 — where does the decimal point go? (a) 0.0256 (b) 2.56 (c) 0.256 (d) 0.00256
  10. 10.5.7 × 17 — where does the decimal point go? (a) 969 (b) 0.969 (c) 96.9 (d) 9.69
  11. 11.8.8 × 8 — where does the decimal point go? (a) 70.4 (b) 704 (c) 0.704 (d) 7.04
  12. 12.0.19 × 23 — where does the decimal point go? (a) 4.37 (b) 43.7 (c) 0.0437 (d) 0.437
  13. 13.0.37 × 38 — where does the decimal point go? (a) 1.406 (b) 140.6 (c) 0.1406 (d) 14.06
  14. 14.9.8 × 8 — where does the decimal point go? (a) 784 (b) 7.84 (c) 78.4 (d) 0.784
  15. 15.7.9 × 6 — where does the decimal point go? (a) 0.474 (b) 474 (c) 47.4 (d) 4.74
  16. 16.0.27 × 43 — where does the decimal point go? (a) 0.1161 (b) 11.61 (c) 116.1 (d) 1.161
  17. 17.0.93 × 1.4 — where does the decimal point go? (a) 0.01302 (b) 1.302 (c) 13.02 (d) 0.1302
  18. 18.0.77 × 3.9 — where does the decimal point go? (a) 30.03 (b) 0.03003 (c) 0.3003 (d) 3.003
  19. 19.0.26 × 37 — where does the decimal point go? (a) 96.2 (b) 0.0962 (c) 0.962 (d) 9.62
  20. 20.0.72 × 3.9 — where does the decimal point go? (a) 2.808 (b) 28.08 (c) 0.2808 (d) 0.02808
  21. 21.0.92 × 0.9 — where does the decimal point go? (a) 0.00828 (b) 8.28 (c) 0.0828 (d) 0.828
  22. 22.5.1 × 9 — where does the decimal point go? (a) 45.9 (b) 0.459 (c) 459 (d) 4.59
  23. 23.0.63 × 0.9 — where does the decimal point go? (a) 0.567 (b) 0.00567 (c) 5.67 (d) 0.0567
  24. 24.2.5 × 5 — where does the decimal point go? (a) 1.25 (b) 0.125 (c) 12.5 (d) 125
  25. 25.0.93 × 0.2 — where does the decimal point go? (a) 0.0186 (b) 0.186 (c) 0.00186 (d) 1.86
  26. 26.0.91 × 35 — where does the decimal point go? (a) 3.185 (b) 318.5 (c) 31.85 (d) 0.3185
  27. 27.0.87 × 4.2 — where does the decimal point go? (a) 3.654 (b) 0.03654 (c) 0.3654 (d) 36.54
  28. 28.0.62 × 0.3 — where does the decimal point go? (a) 0.186 (b) 0.0186 (c) 0.00186 (d) 1.86
  29. 29.5.9 × 37 — where does the decimal point go? (a) 21.83 (b) 218.3 (c) 2.183 (d) 2183
  30. 30.0.53 × 7 — where does the decimal point go? (a) 3.71 (b) 0.371 (c) 0.0371 (d) 37.1
  31. 31.8.4 × 0.3 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 25.2 (d) 2.52
  32. 32.2.2 × 31 — where does the decimal point go? (a) 6.82 (b) 68.2 (c) 682 (d) 0.682
  33. 33.5.8 × 0.6 — where does the decimal point go? (a) 34.8 (b) 3.48 (c) 0.0348 (d) 0.348
  34. 34.3.5 × 0.3 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 0.105 (d) 10.5
  35. 35.0.87 × 4 — where does the decimal point go? (a) 0.348 (b) 0.0348 (c) 3.48 (d) 34.8
  36. 36.0.82 × 3.1 — where does the decimal point go? (a) 2.542 (b) 25.42 (c) 0.02542 (d) 0.2542
  37. 37.0.87 × 4.1 — where does the decimal point go? (a) 0.03567 (b) 35.67 (c) 3.567 (d) 0.3567
  38. 38.8.9 × 9 — where does the decimal point go? (a) 80.1 (b) 0.801 (c) 801 (d) 8.01
  39. 39.2.6 × 3.8 — where does the decimal point go? (a) 9.88 (b) 0.988 (c) 0.0988 (d) 98.8
  40. 40.0.18 × 14 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 2.52 (d) 0.252

Answer key

  1. 0.36
  2. 38.8
  3. 12.06
  4. 73.8
  5. 20.24
  6. 0.118
  7. 24.6
  8. 0.102
  9. 0.256
  10. 96.9
  11. 70.4
  12. 4.37
  13. 14.06
  14. 78.4
  15. 47.4
  16. 11.61
  17. 1.302
  18. 3.003
  19. 9.62
  20. 2.808
  21. 0.828
  22. 45.9
  23. 0.567
  24. 12.5
  25. 0.186
  26. 31.85
  27. 3.654
  28. 0.186
  29. 218.3
  30. 3.71
  31. 2.52
  32. 68.2
  33. 3.48
  34. 1.05
  35. 3.48
  36. 2.542
  37. 3.567
  38. 80.1
  39. 9.88
  40. 2.52

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