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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 324 · 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. 1.7.9 × 3.2 — where does the decimal point go? (a) 252.8 (b) 25.28 (c) 0.2528 (d) 2.528
  2. 2.0.18 × 0.3 — where does the decimal point go? (a) 0.54 (b) 0.0054 (c) 0.054 (d) 0.00054
  3. 3.4.6 × 8 — where does the decimal point go? (a) 368 (b) 36.8 (c) 0.368 (d) 3.68
  4. 4.4.9 × 4 — where does the decimal point go? (a) 19.6 (b) 0.196 (c) 196 (d) 1.96
  5. 5.1.8 × 3.2 — where does the decimal point go? (a) 57.6 (b) 0.576 (c) 5.76 (d) 0.0576
  6. 6.7.3 × 18 — where does the decimal point go? (a) 1314 (b) 131.4 (c) 13.14 (d) 1.314
  7. 7.8.5 × 0.5 — where does the decimal point go? (a) 42.5 (b) 0.0425 (c) 0.425 (d) 4.25
  8. 8.0.35 × 1.5 — where does the decimal point go? (a) 0.00525 (b) 0.525 (c) 5.25 (d) 0.0525
  9. 9.0.52 × 0.2 — where does the decimal point go? (a) 0.104 (b) 0.0104 (c) 0.00104 (d) 1.04
  10. 10.0.28 × 4.6 — where does the decimal point go? (a) 1.288 (b) 0.1288 (c) 12.88 (d) 0.01288
  11. 11.0.29 × 8 — where does the decimal point go? (a) 0.232 (b) 2.32 (c) 23.2 (d) 0.0232
  12. 12.3.1 × 3.8 — where does the decimal point go? (a) 1.178 (b) 11.78 (c) 117.8 (d) 0.1178
  13. 13.8.7 × 2.7 — where does the decimal point go? (a) 0.2349 (b) 234.9 (c) 2.349 (d) 23.49
  14. 14.4.6 × 2 — where does the decimal point go? (a) 92 (b) 0.92 (c) 9.2 (d) 0.092
  15. 15.4.3 × 48 — where does the decimal point go? (a) 20.64 (b) 206.4 (c) 2.064 (d) 2064
  16. 16.6.9 × 0.5 — where does the decimal point go? (a) 34.5 (b) 0.0345 (c) 0.345 (d) 3.45
  17. 17.3.4 × 0.9 — where does the decimal point go? (a) 0.306 (b) 3.06 (c) 0.0306 (d) 30.6
  18. 18.0.37 × 3.4 — where does the decimal point go? (a) 1.258 (b) 0.01258 (c) 12.58 (d) 0.1258
  19. 19.8.4 × 3.6 — where does the decimal point go? (a) 0.3024 (b) 30.24 (c) 302.4 (d) 3.024
  20. 20.3.3 × 0.4 — where does the decimal point go? (a) 0.132 (b) 0.0132 (c) 13.2 (d) 1.32
  21. 21.0.27 × 2.5 — where does the decimal point go? (a) 0.0675 (b) 0.00675 (c) 0.675 (d) 6.75
  22. 22.0.57 × 2 — where does the decimal point go? (a) 1.14 (b) 0.114 (c) 11.4 (d) 0.0114
  23. 23.0.79 × 2.1 — where does the decimal point go? (a) 0.1659 (b) 1.659 (c) 16.59 (d) 0.01659
  24. 24.0.12 × 1.8 — where does the decimal point go? (a) 0.0216 (b) 0.00216 (c) 2.16 (d) 0.216
  25. 25.5.5 × 41 — where does the decimal point go? (a) 225.5 (b) 22.55 (c) 2.255 (d) 2255
  26. 26.2.2 × 0.6 — where does the decimal point go? (a) 0.0132 (b) 1.32 (c) 13.2 (d) 0.132
  27. 27.0.25 × 1.3 — where does the decimal point go? (a) 3.25 (b) 0.325 (c) 0.0325 (d) 0.00325
  28. 28.0.82 × 8 — where does the decimal point go? (a) 6.56 (b) 0.0656 (c) 0.656 (d) 65.6
  29. 29.0.37 × 9 — where does the decimal point go? (a) 0.333 (b) 0.0333 (c) 33.3 (d) 3.33
  30. 30.0.86 × 1.3 — where does the decimal point go? (a) 0.01118 (b) 11.18 (c) 1.118 (d) 0.1118
  31. 31.0.96 × 7 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 67.2 (d) 0.0672
  32. 32.7.3 × 1.3 — where does the decimal point go? (a) 9.49 (b) 0.0949 (c) 94.9 (d) 0.949
  33. 33.8.4 × 18 — where does the decimal point go? (a) 15.12 (b) 1.512 (c) 1512 (d) 151.2
  34. 34.0.34 × 0.3 — where does the decimal point go? (a) 1.02 (b) 0.0102 (c) 0.102 (d) 0.00102
  35. 35.0.12 × 3.4 — where does the decimal point go? (a) 0.408 (b) 0.0408 (c) 4.08 (d) 0.00408
  36. 36.0.85 × 1.3 — where does the decimal point go? (a) 11.05 (b) 0.01105 (c) 0.1105 (d) 1.105
  37. 37.5.3 × 0.9 — where does the decimal point go? (a) 0.0477 (b) 47.7 (c) 0.477 (d) 4.77
  38. 38.6.6 × 4 — where does the decimal point go? (a) 0.264 (b) 2.64 (c) 26.4 (d) 264
  39. 39.3.9 × 0.2 — where does the decimal point go? (a) 0.0078 (b) 0.078 (c) 0.78 (d) 7.8
  40. 40.8.9 × 2.1 — where does the decimal point go? (a) 1.869 (b) 18.69 (c) 186.9 (d) 0.1869

Answer key

  1. 25.28
  2. 0.054
  3. 36.8
  4. 19.6
  5. 5.76
  6. 131.4
  7. 4.25
  8. 0.525
  9. 0.104
  10. 1.288
  11. 2.32
  12. 11.78
  13. 23.49
  14. 9.2
  15. 206.4
  16. 3.45
  17. 3.06
  18. 1.258
  19. 30.24
  20. 1.32
  21. 0.675
  22. 1.14
  23. 1.659
  24. 0.216
  25. 225.5
  26. 1.32
  27. 0.325
  28. 6.56
  29. 3.33
  30. 1.118
  31. 6.72
  32. 9.49
  33. 151.2
  34. 0.102
  35. 0.408
  36. 1.105
  37. 4.77
  38. 26.4
  39. 0.78
  40. 18.69

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