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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 912 · 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 × 39 — where does the decimal point go? (a) 1.365 (b) 0.1365 (c) 13.65 (d) 136.5
  2. 2.0.24 × 34 — where does the decimal point go? (a) 0.0816 (b) 0.816 (c) 81.6 (d) 8.16
  3. 3.0.37 × 27 — where does the decimal point go? (a) 99.9 (b) 0.999 (c) 0.0999 (d) 9.99
  4. 4.1.7 × 0.9 — where does the decimal point go? (a) 0.153 (b) 15.3 (c) 1.53 (d) 0.0153
  5. 5.1.8 × 46 — where does the decimal point go? (a) 8.28 (b) 0.828 (c) 828 (d) 82.8
  6. 6.4.6 × 8 — where does the decimal point go? (a) 36.8 (b) 368 (c) 0.368 (d) 3.68
  7. 7.2.7 × 0.6 — where does the decimal point go? (a) 1.62 (b) 16.2 (c) 0.0162 (d) 0.162
  8. 8.3.1 × 2 — where does the decimal point go? (a) 6.2 (b) 62 (c) 0.062 (d) 0.62
  9. 9.0.98 × 6 — where does the decimal point go? (a) 5.88 (b) 0.0588 (c) 58.8 (d) 0.588
  10. 10.5.4 × 17 — where does the decimal point go? (a) 0.918 (b) 918 (c) 91.8 (d) 9.18
  11. 11.0.26 × 6 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 0.0156 (d) 15.6
  12. 12.0.87 × 21 — where does the decimal point go? (a) 1.827 (b) 18.27 (c) 0.1827 (d) 182.7
  13. 13.0.32 × 48 — where does the decimal point go? (a) 153.6 (b) 1.536 (c) 15.36 (d) 0.1536
  14. 14.8.3 × 2 — where does the decimal point go? (a) 1.66 (b) 0.166 (c) 16.6 (d) 166
  15. 15.0.17 × 0.8 — where does the decimal point go? (a) 0.0136 (b) 0.136 (c) 0.00136 (d) 1.36
  16. 16.0.19 × 0.5 — where does the decimal point go? (a) 0.00095 (b) 0.095 (c) 0.95 (d) 0.0095
  17. 17.0.48 × 12 — where does the decimal point go? (a) 5.76 (b) 0.0576 (c) 0.576 (d) 57.6
  18. 18.0.82 × 0.8 — where does the decimal point go? (a) 0.00656 (b) 0.0656 (c) 0.656 (d) 6.56
  19. 19.2.8 × 6 — where does the decimal point go? (a) 0.168 (b) 168 (c) 1.68 (d) 16.8
  20. 20.0.34 × 0.9 — where does the decimal point go? (a) 0.00306 (b) 3.06 (c) 0.0306 (d) 0.306
  21. 21.7.7 × 6 — where does the decimal point go? (a) 4.62 (b) 462 (c) 46.2 (d) 0.462
  22. 22.7.8 × 3.8 — where does the decimal point go? (a) 0.2964 (b) 2.964 (c) 29.64 (d) 296.4
  23. 23.7.9 × 8 — where does the decimal point go? (a) 6.32 (b) 632 (c) 63.2 (d) 0.632
  24. 24.6.7 × 14 — where does the decimal point go? (a) 9.38 (b) 93.8 (c) 0.938 (d) 938
  25. 25.7.3 × 0.4 — where does the decimal point go? (a) 0.0292 (b) 0.292 (c) 2.92 (d) 29.2
  26. 26.6.4 × 0.7 — where does the decimal point go? (a) 0.448 (b) 44.8 (c) 4.48 (d) 0.0448
  27. 27.7.2 × 7 — where does the decimal point go? (a) 0.504 (b) 50.4 (c) 5.04 (d) 504
  28. 28.0.67 × 9 — where does the decimal point go? (a) 6.03 (b) 0.0603 (c) 60.3 (d) 0.603
  29. 29.3.9 × 0.4 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 15.6 (d) 0.0156
  30. 30.0.52 × 0.3 — where does the decimal point go? (a) 0.00156 (b) 0.156 (c) 0.0156 (d) 1.56
  31. 31.0.52 × 0.6 — where does the decimal point go? (a) 3.12 (b) 0.312 (c) 0.00312 (d) 0.0312
  32. 32.5.4 × 0.2 — where does the decimal point go? (a) 10.8 (b) 0.0108 (c) 0.108 (d) 1.08
  33. 33.0.13 × 45 — where does the decimal point go? (a) 58.5 (b) 0.0585 (c) 5.85 (d) 0.585
  34. 34.3.2 × 29 — where does the decimal point go? (a) 0.928 (b) 92.8 (c) 9.28 (d) 928
  35. 35.0.98 × 28 — where does the decimal point go? (a) 27.44 (b) 0.2744 (c) 2.744 (d) 274.4
  36. 36.3.4 × 8 — where does the decimal point go? (a) 27.2 (b) 2.72 (c) 0.272 (d) 272
  37. 37.0.46 × 7 — where does the decimal point go? (a) 0.322 (b) 3.22 (c) 0.0322 (d) 32.2
  38. 38.0.35 × 11 — where does the decimal point go? (a) 38.5 (b) 3.85 (c) 0.0385 (d) 0.385
  39. 39.6.2 × 36 — where does the decimal point go? (a) 2232 (b) 22.32 (c) 223.2 (d) 2.232
  40. 40.0.96 × 19 — where does the decimal point go? (a) 0.1824 (b) 1.824 (c) 182.4 (d) 18.24

Answer key

  1. 13.65
  2. 8.16
  3. 9.99
  4. 1.53
  5. 82.8
  6. 36.8
  7. 1.62
  8. 6.2
  9. 5.88
  10. 91.8
  11. 1.56
  12. 18.27
  13. 15.36
  14. 16.6
  15. 0.136
  16. 0.095
  17. 5.76
  18. 0.656
  19. 16.8
  20. 0.306
  21. 46.2
  22. 29.64
  23. 63.2
  24. 93.8
  25. 2.92
  26. 4.48
  27. 50.4
  28. 6.03
  29. 1.56
  30. 0.156
  31. 0.312
  32. 1.08
  33. 5.85
  34. 92.8
  35. 27.44
  36. 27.2
  37. 3.22
  38. 3.85
  39. 223.2
  40. 18.24

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