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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 580 · 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. 1.0.35 × 3 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 0.105 (d) 10.5
  2. 2.0.51 × 4.5 — where does the decimal point go? (a) 22.95 (b) 0.02295 (c) 0.2295 (d) 2.295
  3. 3.0.84 × 0.6 — where does the decimal point go? (a) 0.504 (b) 0.00504 (c) 0.0504 (d) 5.04
  4. 4.6.5 × 9 — where does the decimal point go? (a) 585 (b) 5.85 (c) 0.585 (d) 58.5
  5. 5.0.93 × 0.4 — where does the decimal point go? (a) 0.372 (b) 3.72 (c) 0.0372 (d) 0.00372
  6. 6.0.55 × 5 — where does the decimal point go? (a) 2.75 (b) 0.275 (c) 0.0275 (d) 27.5
  7. 7.3.6 × 8 — where does the decimal point go? (a) 288 (b) 28.8 (c) 0.288 (d) 2.88
  8. 8.0.67 × 3.4 — where does the decimal point go? (a) 0.2278 (b) 22.78 (c) 0.02278 (d) 2.278
  9. 9.3.8 × 0.6 — where does the decimal point go? (a) 2.28 (b) 22.8 (c) 0.0228 (d) 0.228
  10. 10.0.97 × 0.7 — where does the decimal point go? (a) 6.79 (b) 0.679 (c) 0.0679 (d) 0.00679
  11. 11.6.4 × 7 — where does the decimal point go? (a) 44.8 (b) 0.448 (c) 448 (d) 4.48
  12. 12.4.7 × 0.2 — where does the decimal point go? (a) 0.094 (b) 9.4 (c) 0.94 (d) 0.0094
  13. 13.7.4 × 0.9 — where does the decimal point go? (a) 0.666 (b) 6.66 (c) 0.0666 (d) 66.6
  14. 14.0.48 × 7 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 33.6 (d) 3.36
  15. 15.3.8 × 22 — where does the decimal point go? (a) 0.836 (b) 8.36 (c) 836 (d) 83.6
  16. 16.7.4 × 0.8 — where does the decimal point go? (a) 5.92 (b) 0.0592 (c) 0.592 (d) 59.2
  17. 17.2.4 × 0.9 — where does the decimal point go? (a) 21.6 (b) 0.0216 (c) 2.16 (d) 0.216
  18. 18.1.7 × 3 — where does the decimal point go? (a) 0.51 (b) 0.051 (c) 51 (d) 5.1
  19. 19.0.45 × 13 — where does the decimal point go? (a) 0.0585 (b) 0.585 (c) 5.85 (d) 58.5
  20. 20.0.26 × 47 — where does the decimal point go? (a) 0.1222 (b) 122.2 (c) 1.222 (d) 12.22
  21. 21.0.62 × 1.4 — where does the decimal point go? (a) 0.868 (b) 8.68 (c) 0.0868 (d) 0.00868
  22. 22.4.2 × 0.8 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 0.0336 (d) 33.6
  23. 23.0.71 × 1.1 — where does the decimal point go? (a) 0.00781 (b) 7.81 (c) 0.781 (d) 0.0781
  24. 24.7.3 × 1.4 — where does the decimal point go? (a) 0.1022 (b) 1.022 (c) 10.22 (d) 102.2
  25. 25.1.9 × 3 — where does the decimal point go? (a) 5.7 (b) 0.057 (c) 0.57 (d) 57
  26. 26.0.26 × 0.2 — where does the decimal point go? (a) 0.52 (b) 0.052 (c) 0.00052 (d) 0.0052
  27. 27.3.2 × 0.8 — where does the decimal point go? (a) 0.0256 (b) 2.56 (c) 0.256 (d) 25.6
  28. 28.0.54 × 3 — where does the decimal point go? (a) 0.0162 (b) 1.62 (c) 0.162 (d) 16.2
  29. 29.9.1 × 0.7 — where does the decimal point go? (a) 6.37 (b) 0.637 (c) 0.0637 (d) 63.7
  30. 30.1.8 × 4.9 — where does the decimal point go? (a) 0.882 (b) 0.0882 (c) 88.2 (d) 8.82
  31. 31.0.23 × 19 — where does the decimal point go? (a) 4.37 (b) 0.437 (c) 43.7 (d) 0.0437
  32. 32.0.39 × 1.1 — where does the decimal point go? (a) 0.429 (b) 0.00429 (c) 4.29 (d) 0.0429
  33. 33.0.58 × 4 — where does the decimal point go? (a) 23.2 (b) 2.32 (c) 0.0232 (d) 0.232
  34. 34.0.32 × 48 — where does the decimal point go? (a) 0.1536 (b) 1.536 (c) 153.6 (d) 15.36
  35. 35.0.43 × 1.1 — where does the decimal point go? (a) 0.0473 (b) 4.73 (c) 0.473 (d) 0.00473
  36. 36.2.9 × 0.3 — where does the decimal point go? (a) 0.087 (b) 0.87 (c) 8.7 (d) 0.0087
  37. 37.1.5 × 5 — where does the decimal point go? (a) 7.5 (b) 0.075 (c) 0.75 (d) 75
  38. 38.0.29 × 2 — where does the decimal point go? (a) 0.58 (b) 5.8 (c) 0.058 (d) 0.0058
  39. 39.0.23 × 2 — where does the decimal point go? (a) 0.046 (b) 0.0046 (c) 0.46 (d) 4.6
  40. 40.0.29 × 0.8 — where does the decimal point go? (a) 0.0232 (b) 2.32 (c) 0.232 (d) 0.00232

Answer key

  1. 1.05
  2. 2.295
  3. 0.504
  4. 58.5
  5. 0.372
  6. 2.75
  7. 28.8
  8. 2.278
  9. 2.28
  10. 0.679
  11. 44.8
  12. 0.94
  13. 6.66
  14. 3.36
  15. 83.6
  16. 5.92
  17. 2.16
  18. 5.1
  19. 5.85
  20. 12.22
  21. 0.868
  22. 3.36
  23. 0.781
  24. 10.22
  25. 5.7
  26. 0.052
  27. 2.56
  28. 1.62
  29. 6.37
  30. 8.82
  31. 4.37
  32. 0.429
  33. 2.32
  34. 15.36
  35. 0.473
  36. 0.87
  37. 7.5
  38. 0.58
  39. 0.46
  40. 0.232

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