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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 364 · 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. 1.8.4 × 2.3 — where does the decimal point go? (a) 1.932 (b) 0.1932 (c) 193.2 (d) 19.32
  2. 2.1.3 × 26 — where does the decimal point go? (a) 0.338 (b) 33.8 (c) 338 (d) 3.38
  3. 3.4.5 × 9 — where does the decimal point go? (a) 40.5 (b) 4.05 (c) 0.405 (d) 405
  4. 4.9.1 × 7 — where does the decimal point go? (a) 6.37 (b) 637 (c) 63.7 (d) 0.637
  5. 5.0.52 × 0.4 — where does the decimal point go? (a) 2.08 (b) 0.0208 (c) 0.208 (d) 0.00208
  6. 6.2.4 × 22 — where does the decimal point go? (a) 0.528 (b) 5.28 (c) 52.8 (d) 528
  7. 7.2.2 × 1.3 — where does the decimal point go? (a) 0.0286 (b) 2.86 (c) 28.6 (d) 0.286
  8. 8.3.9 × 4 — where does the decimal point go? (a) 0.156 (b) 156 (c) 1.56 (d) 15.6
  9. 9.7.4 × 0.6 — where does the decimal point go? (a) 0.444 (b) 4.44 (c) 0.0444 (d) 44.4
  10. 10.3.6 × 4 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 14.4 (d) 144
  11. 11.1.7 × 4.8 — where does the decimal point go? (a) 0.816 (b) 8.16 (c) 0.0816 (d) 81.6
  12. 12.4.8 × 36 — where does the decimal point go? (a) 1728 (b) 172.8 (c) 17.28 (d) 1.728
  13. 13.0.82 × 7 — where does the decimal point go? (a) 57.4 (b) 5.74 (c) 0.574 (d) 0.0574
  14. 14.2.4 × 4.4 — where does the decimal point go? (a) 1.056 (b) 0.1056 (c) 10.56 (d) 105.6
  15. 15.0.55 × 3.1 — where does the decimal point go? (a) 0.01705 (b) 17.05 (c) 1.705 (d) 0.1705
  16. 16.0.22 × 41 — where does the decimal point go? (a) 90.2 (b) 9.02 (c) 0.0902 (d) 0.902
  17. 17.0.22 × 3 — where does the decimal point go? (a) 0.66 (b) 0.0066 (c) 6.6 (d) 0.066
  18. 18.2.1 × 14 — where does the decimal point go? (a) 2.94 (b) 29.4 (c) 294 (d) 0.294
  19. 19.2.3 × 0.2 — where does the decimal point go? (a) 0.0046 (b) 0.46 (c) 0.046 (d) 4.6
  20. 20.0.23 × 3 — where does the decimal point go? (a) 0.69 (b) 6.9 (c) 0.069 (d) 0.0069
  21. 21.0.82 × 0.3 — where does the decimal point go? (a) 0.00246 (b) 2.46 (c) 0.0246 (d) 0.246
  22. 22.0.88 × 23 — where does the decimal point go? (a) 0.2024 (b) 20.24 (c) 202.4 (d) 2.024
  23. 23.0.46 × 3 — where does the decimal point go? (a) 0.0138 (b) 0.138 (c) 13.8 (d) 1.38
  24. 24.0.21 × 0.3 — where does the decimal point go? (a) 0.00063 (b) 0.063 (c) 0.0063 (d) 0.63
  25. 25.5.6 × 17 — where does the decimal point go? (a) 0.952 (b) 95.2 (c) 9.52 (d) 952
  26. 26.0.17 × 8 — where does the decimal point go? (a) 0.136 (b) 1.36 (c) 13.6 (d) 0.0136
  27. 27.0.49 × 15 — where does the decimal point go? (a) 7.35 (b) 73.5 (c) 0.735 (d) 0.0735
  28. 28.8.9 × 0.2 — where does the decimal point go? (a) 17.8 (b) 0.0178 (c) 0.178 (d) 1.78
  29. 29.2.8 × 28 — where does the decimal point go? (a) 7.84 (b) 784 (c) 0.784 (d) 78.4
  30. 30.2.9 × 0.7 — where does the decimal point go? (a) 2.03 (b) 0.203 (c) 0.0203 (d) 20.3
  31. 31.8.6 × 21 — where does the decimal point go? (a) 18.06 (b) 1.806 (c) 180.6 (d) 1806
  32. 32.0.62 × 6 — where does the decimal point go? (a) 37.2 (b) 0.0372 (c) 0.372 (d) 3.72
  33. 33.0.28 × 47 — where does the decimal point go? (a) 0.1316 (b) 13.16 (c) 1.316 (d) 131.6
  34. 34.0.27 × 8 — where does the decimal point go? (a) 21.6 (b) 0.0216 (c) 2.16 (d) 0.216
  35. 35.5.3 × 0.2 — where does the decimal point go? (a) 0.0106 (b) 1.06 (c) 0.106 (d) 10.6
  36. 36.1.9 × 1.9 — where does the decimal point go? (a) 0.0361 (b) 0.361 (c) 36.1 (d) 3.61
  37. 37.0.22 × 6 — where does the decimal point go? (a) 0.132 (b) 0.0132 (c) 1.32 (d) 13.2
  38. 38.3.4 × 0.6 — where does the decimal point go? (a) 0.204 (b) 0.0204 (c) 20.4 (d) 2.04
  39. 39.0.63 × 18 — where does the decimal point go? (a) 1.134 (b) 11.34 (c) 0.1134 (d) 113.4
  40. 40.2.2 × 7 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 15.4 (d) 154

Answer key

  1. 19.32
  2. 33.8
  3. 40.5
  4. 63.7
  5. 0.208
  6. 52.8
  7. 2.86
  8. 15.6
  9. 4.44
  10. 14.4
  11. 8.16
  12. 172.8
  13. 5.74
  14. 10.56
  15. 1.705
  16. 9.02
  17. 0.66
  18. 29.4
  19. 0.46
  20. 0.69
  21. 0.246
  22. 20.24
  23. 1.38
  24. 0.063
  25. 95.2
  26. 1.36
  27. 7.35
  28. 1.78
  29. 78.4
  30. 2.03
  31. 180.6
  32. 3.72
  33. 13.16
  34. 2.16
  35. 1.06
  36. 3.61
  37. 1.32
  38. 2.04
  39. 11.34
  40. 15.4

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