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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 356 · 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. 1.8.8 × 7 — where does the decimal point go? (a) 616 (b) 0.616 (c) 61.6 (d) 6.16
  2. 2.1.9 × 1.1 — where does the decimal point go? (a) 0.209 (b) 0.0209 (c) 2.09 (d) 20.9
  3. 3.0.83 × 0.4 — where does the decimal point go? (a) 0.332 (b) 3.32 (c) 0.00332 (d) 0.0332
  4. 4.7.6 × 44 — where does the decimal point go? (a) 33.44 (b) 3.344 (c) 334.4 (d) 3344
  5. 5.4.8 × 0.3 — where does the decimal point go? (a) 14.4 (b) 1.44 (c) 0.0144 (d) 0.144
  6. 6.0.56 × 7 — where does the decimal point go? (a) 0.392 (b) 3.92 (c) 0.0392 (d) 39.2
  7. 7.9.6 × 9 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 864 (d) 8.64
  8. 8.0.54 × 1.6 — where does the decimal point go? (a) 0.00864 (b) 0.0864 (c) 0.864 (d) 8.64
  9. 9.0.99 × 6 — where does the decimal point go? (a) 59.4 (b) 5.94 (c) 0.594 (d) 0.0594
  10. 10.4.4 × 6 — where does the decimal point go? (a) 2.64 (b) 26.4 (c) 264 (d) 0.264
  11. 11.0.28 × 6 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 0.0168
  12. 12.0.96 × 9 — where does the decimal point go? (a) 8.64 (b) 0.0864 (c) 86.4 (d) 0.864
  13. 13.0.87 × 19 — where does the decimal point go? (a) 0.1653 (b) 1.653 (c) 16.53 (d) 165.3
  14. 14.6.2 × 39 — where does the decimal point go? (a) 24.18 (b) 2.418 (c) 241.8 (d) 2418
  15. 15.3.1 × 0.9 — where does the decimal point go? (a) 0.0279 (b) 27.9 (c) 0.279 (d) 2.79
  16. 16.4.1 × 2 — where does the decimal point go? (a) 82 (b) 0.82 (c) 0.082 (d) 8.2
  17. 17.2.1 × 1.5 — where does the decimal point go? (a) 0.315 (b) 0.0315 (c) 31.5 (d) 3.15
  18. 18.0.18 × 0.3 — where does the decimal point go? (a) 0.0054 (b) 0.054 (c) 0.54 (d) 0.00054
  19. 19.0.75 × 0.5 — where does the decimal point go? (a) 0.00375 (b) 3.75 (c) 0.375 (d) 0.0375
  20. 20.8.3 × 4 — where does the decimal point go? (a) 3.32 (b) 332 (c) 0.332 (d) 33.2
  21. 21.2.1 × 0.3 — where does the decimal point go? (a) 0.63 (b) 6.3 (c) 0.0063 (d) 0.063
  22. 22.1.4 × 12 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 168
  23. 23.9.5 × 15 — where does the decimal point go? (a) 14.25 (b) 142.5 (c) 1.425 (d) 1425
  24. 24.3.6 × 28 — where does the decimal point go? (a) 10.08 (b) 1008 (c) 1.008 (d) 100.8
  25. 25.5.9 × 4.3 — where does the decimal point go? (a) 253.7 (b) 0.2537 (c) 25.37 (d) 2.537
  26. 26.5.4 × 0.3 — where does the decimal point go? (a) 0.0162 (b) 0.162 (c) 1.62 (d) 16.2
  27. 27.3.3 × 1.9 — where does the decimal point go? (a) 0.0627 (b) 6.27 (c) 62.7 (d) 0.627
  28. 28.1.9 × 0.6 — where does the decimal point go? (a) 0.0114 (b) 11.4 (c) 0.114 (d) 1.14
  29. 29.0.52 × 8 — where does the decimal point go? (a) 41.6 (b) 4.16 (c) 0.416 (d) 0.0416
  30. 30.2.6 × 7 — where does the decimal point go? (a) 18.2 (b) 0.182 (c) 1.82 (d) 182
  31. 31.2.9 × 0.7 — where does the decimal point go? (a) 0.203 (b) 0.0203 (c) 2.03 (d) 20.3
  32. 32.0.45 × 7 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 0.315 (d) 0.0315
  33. 33.1.8 × 6 — where does the decimal point go? (a) 10.8 (b) 108 (c) 0.108 (d) 1.08
  34. 34.4.4 × 48 — where does the decimal point go? (a) 2112 (b) 211.2 (c) 21.12 (d) 2.112
  35. 35.1.8 × 0.6 — where does the decimal point go? (a) 1.08 (b) 0.0108 (c) 0.108 (d) 10.8
  36. 36.4.2 × 33 — where does the decimal point go? (a) 1.386 (b) 13.86 (c) 1386 (d) 138.6
  37. 37.7.9 × 0.3 — where does the decimal point go? (a) 2.37 (b) 0.237 (c) 0.0237 (d) 23.7
  38. 38.9.9 × 0.6 — where does the decimal point go? (a) 5.94 (b) 0.594 (c) 59.4 (d) 0.0594
  39. 39.8.4 × 1.9 — where does the decimal point go? (a) 1.596 (b) 15.96 (c) 0.1596 (d) 159.6
  40. 40.0.45 × 3 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 0.0135 (d) 0.135

Answer key

  1. 61.6
  2. 2.09
  3. 0.332
  4. 334.4
  5. 1.44
  6. 3.92
  7. 86.4
  8. 0.864
  9. 5.94
  10. 26.4
  11. 1.68
  12. 8.64
  13. 16.53
  14. 241.8
  15. 2.79
  16. 8.2
  17. 3.15
  18. 0.054
  19. 0.375
  20. 33.2
  21. 0.63
  22. 16.8
  23. 142.5
  24. 100.8
  25. 25.37
  26. 1.62
  27. 6.27
  28. 1.14
  29. 4.16
  30. 18.2
  31. 2.03
  32. 3.15
  33. 10.8
  34. 211.2
  35. 1.08
  36. 138.6
  37. 2.37
  38. 5.94
  39. 15.96
  40. 1.35

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