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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 818 · 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. 1.9.7 × 0.8 — where does the decimal point go? (a) 0.0776 (b) 0.776 (c) 7.76 (d) 77.6
  2. 2.0.83 × 3 — where does the decimal point go? (a) 2.49 (b) 0.249 (c) 0.0249 (d) 24.9
  3. 3.0.56 × 12 — where does the decimal point go? (a) 0.0672 (b) 0.672 (c) 6.72 (d) 67.2
  4. 4.0.26 × 0.3 — where does the decimal point go? (a) 0.78 (b) 0.0078 (c) 0.00078 (d) 0.078
  5. 5.0.51 × 0.4 — where does the decimal point go? (a) 0.0204 (b) 0.204 (c) 2.04 (d) 0.00204
  6. 6.9.3 × 0.6 — where does the decimal point go? (a) 5.58 (b) 55.8 (c) 0.0558 (d) 0.558
  7. 7.7.4 × 4 — where does the decimal point go? (a) 2.96 (b) 296 (c) 29.6 (d) 0.296
  8. 8.2.5 × 15 — where does the decimal point go? (a) 3.75 (b) 375 (c) 0.375 (d) 37.5
  9. 9.0.54 × 4.8 — where does the decimal point go? (a) 0.02592 (b) 0.2592 (c) 25.92 (d) 2.592
  10. 10.4.6 × 0.2 — where does the decimal point go? (a) 0.0092 (b) 0.92 (c) 0.092 (d) 9.2
  11. 11.0.85 × 31 — where does the decimal point go? (a) 263.5 (b) 2.635 (c) 26.35 (d) 0.2635
  12. 12.9.6 × 4 — where does the decimal point go? (a) 38.4 (b) 3.84 (c) 384 (d) 0.384
  13. 13.2.7 × 25 — where does the decimal point go? (a) 675 (b) 0.675 (c) 6.75 (d) 67.5
  14. 14.8.2 × 4 — where does the decimal point go? (a) 328 (b) 0.328 (c) 32.8 (d) 3.28
  15. 15.1.9 × 1.6 — where does the decimal point go? (a) 0.0304 (b) 30.4 (c) 0.304 (d) 3.04
  16. 16.0.29 × 0.6 — where does the decimal point go? (a) 0.0174 (b) 0.00174 (c) 1.74 (d) 0.174
  17. 17.5.3 × 2.2 — where does the decimal point go? (a) 0.1166 (b) 1.166 (c) 116.6 (d) 11.66
  18. 18.0.14 × 3 — where does the decimal point go? (a) 4.2 (b) 0.42 (c) 0.042 (d) 0.0042
  19. 19.6.9 × 5 — where does the decimal point go? (a) 345 (b) 3.45 (c) 34.5 (d) 0.345
  20. 20.8.3 × 0.8 — where does the decimal point go? (a) 0.0664 (b) 66.4 (c) 0.664 (d) 6.64
  21. 21.3.7 × 4 — where does the decimal point go? (a) 0.148 (b) 14.8 (c) 1.48 (d) 148
  22. 22.7.4 × 8 — where does the decimal point go? (a) 59.2 (b) 0.592 (c) 592 (d) 5.92
  23. 23.0.81 × 27 — where does the decimal point go? (a) 21.87 (b) 218.7 (c) 0.2187 (d) 2.187
  24. 24.0.79 × 0.2 — where does the decimal point go? (a) 0.00158 (b) 0.0158 (c) 1.58 (d) 0.158
  25. 25.6.1 × 16 — where does the decimal point go? (a) 0.976 (b) 976 (c) 97.6 (d) 9.76
  26. 26.0.73 × 41 — where does the decimal point go? (a) 2.993 (b) 299.3 (c) 29.93 (d) 0.2993
  27. 27.0.21 × 0.4 — where does the decimal point go? (a) 0.00084 (b) 0.084 (c) 0.0084 (d) 0.84
  28. 28.0.92 × 0.3 — where does the decimal point go? (a) 0.00276 (b) 2.76 (c) 0.0276 (d) 0.276
  29. 29.0.24 × 27 — where does the decimal point go? (a) 0.648 (b) 6.48 (c) 64.8 (d) 0.0648
  30. 30.2.1 × 4 — where does the decimal point go? (a) 84 (b) 0.084 (c) 8.4 (d) 0.84
  31. 31.0.31 × 6 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 0.186 (d) 18.6
  32. 32.9.9 × 14 — where does the decimal point go? (a) 1.386 (b) 138.6 (c) 13.86 (d) 1386
  33. 33.2.6 × 9 — where does the decimal point go? (a) 2.34 (b) 23.4 (c) 234 (d) 0.234
  34. 34.0.52 × 9 — where does the decimal point go? (a) 4.68 (b) 0.0468 (c) 0.468 (d) 46.8
  35. 35.5.3 × 0.8 — where does the decimal point go? (a) 4.24 (b) 0.424 (c) 0.0424 (d) 42.4
  36. 36.1.8 × 0.6 — where does the decimal point go? (a) 10.8 (b) 0.108 (c) 1.08 (d) 0.0108
  37. 37.0.63 × 8 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 5.04 (d) 50.4
  38. 38.2.3 × 6 — where does the decimal point go? (a) 13.8 (b) 0.138 (c) 1.38 (d) 138
  39. 39.1.7 × 3.4 — where does the decimal point go? (a) 0.578 (b) 0.0578 (c) 57.8 (d) 5.78
  40. 40.8.7 × 0.6 — where does the decimal point go? (a) 5.22 (b) 52.2 (c) 0.0522 (d) 0.522

Answer key

  1. 7.76
  2. 2.49
  3. 6.72
  4. 0.078
  5. 0.204
  6. 5.58
  7. 29.6
  8. 37.5
  9. 2.592
  10. 0.92
  11. 26.35
  12. 38.4
  13. 67.5
  14. 32.8
  15. 3.04
  16. 0.174
  17. 11.66
  18. 0.42
  19. 34.5
  20. 6.64
  21. 14.8
  22. 59.2
  23. 21.87
  24. 0.158
  25. 97.6
  26. 29.93
  27. 0.084
  28. 0.276
  29. 6.48
  30. 8.4
  31. 1.86
  32. 138.6
  33. 23.4
  34. 4.68
  35. 4.24
  36. 1.08
  37. 5.04
  38. 13.8
  39. 5.78
  40. 5.22

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