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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 890 · 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. 1.2.6 × 7 — where does the decimal point go? (a) 182 (b) 1.82 (c) 18.2 (d) 0.182
  2. 2.0.29 × 0.8 — where does the decimal point go? (a) 0.0232 (b) 0.00232 (c) 2.32 (d) 0.232
  3. 3.0.29 × 3 — where does the decimal point go? (a) 0.87 (b) 0.087 (c) 8.7 (d) 0.0087
  4. 4.0.26 × 17 — where does the decimal point go? (a) 0.442 (b) 4.42 (c) 0.0442 (d) 44.2
  5. 5.0.48 × 27 — where does the decimal point go? (a) 1.296 (b) 0.1296 (c) 12.96 (d) 129.6
  6. 6.8.9 × 14 — where does the decimal point go? (a) 12.46 (b) 124.6 (c) 1.246 (d) 1246
  7. 7.0.92 × 7 — where does the decimal point go? (a) 64.4 (b) 0.644 (c) 0.0644 (d) 6.44
  8. 8.0.96 × 3.6 — where does the decimal point go? (a) 3.456 (b) 0.3456 (c) 0.03456 (d) 34.56
  9. 9.0.87 × 34 — where does the decimal point go? (a) 2.958 (b) 0.2958 (c) 295.8 (d) 29.58
  10. 10.2.5 × 1.9 — where does the decimal point go? (a) 0.475 (b) 0.0475 (c) 47.5 (d) 4.75
  11. 11.0.82 × 0.6 — where does the decimal point go? (a) 4.92 (b) 0.492 (c) 0.00492 (d) 0.0492
  12. 12.7.2 × 16 — where does the decimal point go? (a) 1.152 (b) 115.2 (c) 11.52 (d) 1152
  13. 13.2.9 × 4.9 — where does the decimal point go? (a) 142.1 (b) 14.21 (c) 0.1421 (d) 1.421
  14. 14.4.9 × 2 — where does the decimal point go? (a) 0.98 (b) 98 (c) 9.8 (d) 0.098
  15. 15.0.68 × 8 — where does the decimal point go? (a) 0.544 (b) 54.4 (c) 0.0544 (d) 5.44
  16. 16.0.29 × 4.5 — where does the decimal point go? (a) 1.305 (b) 0.01305 (c) 13.05 (d) 0.1305
  17. 17.0.44 × 31 — where does the decimal point go? (a) 0.1364 (b) 1.364 (c) 13.64 (d) 136.4
  18. 18.0.63 × 4.9 — where does the decimal point go? (a) 30.87 (b) 0.3087 (c) 3.087 (d) 0.03087
  19. 19.5.8 × 17 — where does the decimal point go? (a) 9.86 (b) 986 (c) 98.6 (d) 0.986
  20. 20.0.94 × 0.9 — where does the decimal point go? (a) 0.846 (b) 8.46 (c) 0.0846 (d) 0.00846
  21. 21.5.7 × 43 — where does the decimal point go? (a) 24.51 (b) 245.1 (c) 2451 (d) 2.451
  22. 22.3.6 × 0.2 — where does the decimal point go? (a) 0.0072 (b) 0.072 (c) 0.72 (d) 7.2
  23. 23.2.8 × 0.2 — where does the decimal point go? (a) 0.56 (b) 0.056 (c) 0.0056 (d) 5.6
  24. 24.0.81 × 9 — where does the decimal point go? (a) 7.29 (b) 0.729 (c) 0.0729 (d) 72.9
  25. 25.2.2 × 2.4 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.528 (d) 0.0528
  26. 26.1.6 × 8 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 128 (d) 1.28
  27. 27.8.2 × 8 — where does the decimal point go? (a) 65.6 (b) 0.656 (c) 656 (d) 6.56
  28. 28.0.95 × 1.9 — where does the decimal point go? (a) 0.1805 (b) 18.05 (c) 1.805 (d) 0.01805
  29. 29.8.9 × 28 — where does the decimal point go? (a) 249.2 (b) 2.492 (c) 24.92 (d) 2492
  30. 30.3.7 × 0.7 — where does the decimal point go? (a) 2.59 (b) 0.259 (c) 0.0259 (d) 25.9
  31. 31.0.78 × 9 — where does the decimal point go? (a) 7.02 (b) 70.2 (c) 0.702 (d) 0.0702
  32. 32.7.8 × 2.1 — where does the decimal point go? (a) 163.8 (b) 16.38 (c) 0.1638 (d) 1.638
  33. 33.0.56 × 0.3 — where does the decimal point go? (a) 0.00168 (b) 1.68 (c) 0.168 (d) 0.0168
  34. 34.6.2 × 0.8 — where does the decimal point go? (a) 0.496 (b) 49.6 (c) 0.0496 (d) 4.96
  35. 35.2.6 × 0.9 — where does the decimal point go? (a) 23.4 (b) 2.34 (c) 0.0234 (d) 0.234
  36. 36.0.22 × 36 — where does the decimal point go? (a) 79.2 (b) 0.0792 (c) 7.92 (d) 0.792
  37. 37.0.31 × 36 — where does the decimal point go? (a) 111.6 (b) 1.116 (c) 11.16 (d) 0.1116
  38. 38.9.2 × 1.9 — where does the decimal point go? (a) 0.1748 (b) 1.748 (c) 17.48 (d) 174.8
  39. 39.3.6 × 28 — where does the decimal point go? (a) 1.008 (b) 1008 (c) 10.08 (d) 100.8
  40. 40.0.57 × 42 — where does the decimal point go? (a) 2.394 (b) 0.2394 (c) 23.94 (d) 239.4

Answer key

  1. 18.2
  2. 0.232
  3. 0.87
  4. 4.42
  5. 12.96
  6. 124.6
  7. 6.44
  8. 3.456
  9. 29.58
  10. 4.75
  11. 0.492
  12. 115.2
  13. 14.21
  14. 9.8
  15. 5.44
  16. 1.305
  17. 13.64
  18. 3.087
  19. 98.6
  20. 0.846
  21. 245.1
  22. 0.72
  23. 0.56
  24. 7.29
  25. 5.28
  26. 12.8
  27. 65.6
  28. 1.805
  29. 249.2
  30. 2.59
  31. 7.02
  32. 16.38
  33. 0.168
  34. 4.96
  35. 2.34
  36. 7.92
  37. 11.16
  38. 17.48
  39. 100.8
  40. 23.94

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