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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 658 · 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. 1.3.1 × 0.2 — where does the decimal point go? (a) 0.62 (b) 0.0062 (c) 0.062 (d) 6.2
  2. 2.8.3 × 4.7 — where does the decimal point go? (a) 39.01 (b) 3.901 (c) 0.3901 (d) 390.1
  3. 3.0.32 × 1.6 — where does the decimal point go? (a) 0.512 (b) 0.00512 (c) 5.12 (d) 0.0512
  4. 4.4.5 × 3 — where does the decimal point go? (a) 1.35 (b) 135 (c) 0.135 (d) 13.5
  5. 5.0.44 × 38 — where does the decimal point go? (a) 16.72 (b) 0.1672 (c) 167.2 (d) 1.672
  6. 6.3.5 × 2.9 — where does the decimal point go? (a) 10.15 (b) 0.1015 (c) 101.5 (d) 1.015
  7. 7.2.3 × 0.6 — where does the decimal point go? (a) 1.38 (b) 0.0138 (c) 0.138 (d) 13.8
  8. 8.0.68 × 0.4 — where does the decimal point go? (a) 0.0272 (b) 2.72 (c) 0.00272 (d) 0.272
  9. 9.5.1 × 2.1 — where does the decimal point go? (a) 0.1071 (b) 1.071 (c) 107.1 (d) 10.71
  10. 10.0.77 × 1.6 — where does the decimal point go? (a) 0.01232 (b) 12.32 (c) 0.1232 (d) 1.232
  11. 11.1.2 × 3.4 — where does the decimal point go? (a) 0.408 (b) 0.0408 (c) 40.8 (d) 4.08
  12. 12.2.4 × 3.3 — where does the decimal point go? (a) 0.0792 (b) 0.792 (c) 7.92 (d) 79.2
  13. 13.7.3 × 1.8 — where does the decimal point go? (a) 13.14 (b) 131.4 (c) 0.1314 (d) 1.314
  14. 14.4.8 × 0.9 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.432 (d) 0.0432
  15. 15.4.5 × 13 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 585 (d) 58.5
  16. 16.0.37 × 12 — where does the decimal point go? (a) 0.0444 (b) 0.444 (c) 44.4 (d) 4.44
  17. 17.4.3 × 1.4 — where does the decimal point go? (a) 6.02 (b) 0.602 (c) 0.0602 (d) 60.2
  18. 18.5.1 × 3.3 — where does the decimal point go? (a) 16.83 (b) 0.1683 (c) 1.683 (d) 168.3
  19. 19.0.76 × 3.7 — where does the decimal point go? (a) 0.02812 (b) 0.2812 (c) 28.12 (d) 2.812
  20. 20.0.32 × 3.8 — where does the decimal point go? (a) 12.16 (b) 0.1216 (c) 0.01216 (d) 1.216
  21. 21.0.47 × 0.9 — where does the decimal point go? (a) 4.23 (b) 0.0423 (c) 0.423 (d) 0.00423
  22. 22.0.91 × 18 — where does the decimal point go? (a) 163.8 (b) 0.1638 (c) 1.638 (d) 16.38
  23. 23.7.7 × 4.9 — where does the decimal point go? (a) 37.73 (b) 3.773 (c) 0.3773 (d) 377.3
  24. 24.8.6 × 3.8 — where does the decimal point go? (a) 32.68 (b) 0.3268 (c) 326.8 (d) 3.268
  25. 25.0.23 × 43 — where does the decimal point go? (a) 98.9 (b) 9.89 (c) 0.0989 (d) 0.989
  26. 26.9.9 × 0.5 — where does the decimal point go? (a) 0.0495 (b) 0.495 (c) 49.5 (d) 4.95
  27. 27.0.71 × 42 — where does the decimal point go? (a) 0.2982 (b) 2.982 (c) 298.2 (d) 29.82
  28. 28.2.7 × 43 — where does the decimal point go? (a) 11.61 (b) 116.1 (c) 1.161 (d) 1161
  29. 29.0.34 × 4 — where does the decimal point go? (a) 0.136 (b) 13.6 (c) 0.0136 (d) 1.36
  30. 30.0.12 × 27 — where does the decimal point go? (a) 0.324 (b) 32.4 (c) 3.24 (d) 0.0324
  31. 31.0.73 × 2.5 — where does the decimal point go? (a) 18.25 (b) 1.825 (c) 0.01825 (d) 0.1825
  32. 32.0.24 × 4 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 0.096 (d) 0.0096
  33. 33.0.42 × 7 — where does the decimal point go? (a) 2.94 (b) 0.294 (c) 29.4 (d) 0.0294
  34. 34.0.62 × 18 — where does the decimal point go? (a) 111.6 (b) 11.16 (c) 0.1116 (d) 1.116
  35. 35.0.37 × 32 — where does the decimal point go? (a) 11.84 (b) 118.4 (c) 0.1184 (d) 1.184
  36. 36.5.2 × 36 — where does the decimal point go? (a) 1.872 (b) 18.72 (c) 1872 (d) 187.2
  37. 37.0.61 × 5 — where does the decimal point go? (a) 0.305 (b) 3.05 (c) 0.0305 (d) 30.5
  38. 38.0.49 × 0.8 — where does the decimal point go? (a) 0.0392 (b) 0.392 (c) 3.92 (d) 0.00392
  39. 39.4.1 × 0.2 — where does the decimal point go? (a) 0.82 (b) 0.0082 (c) 0.082 (d) 8.2
  40. 40.0.81 × 5 — where does the decimal point go? (a) 0.0405 (b) 0.405 (c) 4.05 (d) 40.5

Answer key

  1. 0.62
  2. 39.01
  3. 0.512
  4. 13.5
  5. 16.72
  6. 10.15
  7. 1.38
  8. 0.272
  9. 10.71
  10. 1.232
  11. 4.08
  12. 7.92
  13. 13.14
  14. 4.32
  15. 58.5
  16. 4.44
  17. 6.02
  18. 16.83
  19. 2.812
  20. 1.216
  21. 0.423
  22. 16.38
  23. 37.73
  24. 32.68
  25. 9.89
  26. 4.95
  27. 29.82
  28. 116.1
  29. 1.36
  30. 3.24
  31. 1.825
  32. 0.96
  33. 2.94
  34. 11.16
  35. 11.84
  36. 187.2
  37. 3.05
  38. 0.392
  39. 0.82
  40. 4.05

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