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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 834 · 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. 1.0.24 × 3.6 — where does the decimal point go? (a) 8.64 (b) 0.0864 (c) 0.00864 (d) 0.864
  2. 2.0.84 × 4 — where does the decimal point go? (a) 0.0336 (b) 3.36 (c) 0.336 (d) 33.6
  3. 3.3.9 × 9 — where does the decimal point go? (a) 351 (b) 3.51 (c) 35.1 (d) 0.351
  4. 4.9.8 × 0.7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 68.6 (d) 0.0686
  5. 5.2.6 × 6 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 156 (d) 15.6
  6. 6.5.9 × 0.6 — where does the decimal point go? (a) 0.0354 (b) 35.4 (c) 0.354 (d) 3.54
  7. 7.0.36 × 37 — where does the decimal point go? (a) 1.332 (b) 13.32 (c) 133.2 (d) 0.1332
  8. 8.4.1 × 8 — where does the decimal point go? (a) 32.8 (b) 328 (c) 0.328 (d) 3.28
  9. 9.9.3 × 34 — where does the decimal point go? (a) 31.62 (b) 3162 (c) 316.2 (d) 3.162
  10. 10.0.46 × 2.6 — where does the decimal point go? (a) 0.1196 (b) 0.01196 (c) 1.196 (d) 11.96
  11. 11.9.2 × 17 — where does the decimal point go? (a) 156.4 (b) 1.564 (c) 1564 (d) 15.64
  12. 12.4.3 × 3 — where does the decimal point go? (a) 129 (b) 12.9 (c) 1.29 (d) 0.129
  13. 13.5.1 × 2.9 — where does the decimal point go? (a) 1.479 (b) 0.1479 (c) 14.79 (d) 147.9
  14. 14.0.91 × 0.5 — where does the decimal point go? (a) 0.0455 (b) 0.00455 (c) 4.55 (d) 0.455
  15. 15.0.48 × 0.6 — where does the decimal point go? (a) 0.288 (b) 0.00288 (c) 2.88 (d) 0.0288
  16. 16.0.13 × 0.3 — where does the decimal point go? (a) 0.39 (b) 0.0039 (c) 0.039 (d) 0.00039
  17. 17.2.7 × 14 — where does the decimal point go? (a) 0.378 (b) 3.78 (c) 378 (d) 37.8
  18. 18.8.9 × 9 — where does the decimal point go? (a) 80.1 (b) 8.01 (c) 0.801 (d) 801
  19. 19.0.91 × 3 — where does the decimal point go? (a) 27.3 (b) 0.273 (c) 0.0273 (d) 2.73
  20. 20.0.12 × 4.6 — where does the decimal point go? (a) 0.00552 (b) 0.552 (c) 0.0552 (d) 5.52
  21. 21.1.7 × 5 — where does the decimal point go? (a) 0.085 (b) 8.5 (c) 0.85 (d) 85
  22. 22.3.4 × 0.2 — where does the decimal point go? (a) 0.68 (b) 0.068 (c) 0.0068 (d) 6.8
  23. 23.5.3 × 32 — where does the decimal point go? (a) 16.96 (b) 1696 (c) 1.696 (d) 169.6
  24. 24.7.9 × 24 — where does the decimal point go? (a) 1896 (b) 1.896 (c) 189.6 (d) 18.96
  25. 25.0.29 × 1.8 — where does the decimal point go? (a) 0.00522 (b) 5.22 (c) 0.522 (d) 0.0522
  26. 26.0.16 × 1.8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.0288 (d) 0.00288
  27. 27.4.8 × 3 — where does the decimal point go? (a) 1.44 (b) 0.144 (c) 144 (d) 14.4
  28. 28.0.84 × 0.6 — where does the decimal point go? (a) 0.0504 (b) 0.00504 (c) 0.504 (d) 5.04
  29. 29.0.42 × 8 — where does the decimal point go? (a) 0.336 (b) 33.6 (c) 0.0336 (d) 3.36
  30. 30.0.96 × 6 — where does the decimal point go? (a) 0.0576 (b) 5.76 (c) 0.576 (d) 57.6
  31. 31.3.5 × 23 — where does the decimal point go? (a) 8.05 (b) 80.5 (c) 805 (d) 0.805
  32. 32.0.96 × 3 — where does the decimal point go? (a) 28.8 (b) 2.88 (c) 0.288 (d) 0.0288
  33. 33.0.16 × 6 — where does the decimal point go? (a) 0.96 (b) 0.0096 (c) 0.096 (d) 9.6
  34. 34.0.32 × 27 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 8.64 (d) 0.0864
  35. 35.0.96 × 0.8 — where does the decimal point go? (a) 0.00768 (b) 0.768 (c) 7.68 (d) 0.0768
  36. 36.0.91 × 27 — where does the decimal point go? (a) 245.7 (b) 24.57 (c) 2.457 (d) 0.2457
  37. 37.0.84 × 9 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 75.6 (d) 0.0756
  38. 38.5.6 × 8 — where does the decimal point go? (a) 0.448 (b) 448 (c) 44.8 (d) 4.48
  39. 39.8.3 × 2.7 — where does the decimal point go? (a) 224.1 (b) 22.41 (c) 2.241 (d) 0.2241
  40. 40.9.4 × 3 — where does the decimal point go? (a) 0.282 (b) 282 (c) 28.2 (d) 2.82

Answer key

  1. 0.864
  2. 3.36
  3. 35.1
  4. 6.86
  5. 15.6
  6. 3.54
  7. 13.32
  8. 32.8
  9. 316.2
  10. 1.196
  11. 156.4
  12. 12.9
  13. 14.79
  14. 0.455
  15. 0.288
  16. 0.039
  17. 37.8
  18. 80.1
  19. 2.73
  20. 0.552
  21. 8.5
  22. 0.68
  23. 169.6
  24. 189.6
  25. 0.522
  26. 0.288
  27. 14.4
  28. 0.504
  29. 3.36
  30. 5.76
  31. 80.5
  32. 2.88
  33. 0.96
  34. 8.64
  35. 0.768
  36. 24.57
  37. 7.56
  38. 44.8
  39. 22.41
  40. 28.2

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