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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 16 · 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. 1.0.49 × 7 — where does the decimal point go? (a) 0.0343 (b) 3.43 (c) 34.3 (d) 0.343
  2. 2.9.6 × 0.6 — where does the decimal point go? (a) 5.76 (b) 0.576 (c) 0.0576 (d) 57.6
  3. 3.2.1 × 4.4 — where does the decimal point go? (a) 0.0924 (b) 0.924 (c) 92.4 (d) 9.24
  4. 4.8.9 × 18 — where does the decimal point go? (a) 1602 (b) 1.602 (c) 16.02 (d) 160.2
  5. 5.5.1 × 3.6 — where does the decimal point go? (a) 1.836 (b) 0.1836 (c) 18.36 (d) 183.6
  6. 6.7.6 × 0.8 — where does the decimal point go? (a) 0.608 (b) 6.08 (c) 60.8 (d) 0.0608
  7. 7.5.9 × 4.8 — where does the decimal point go? (a) 0.2832 (b) 283.2 (c) 2.832 (d) 28.32
  8. 8.9.4 × 4 — where does the decimal point go? (a) 376 (b) 37.6 (c) 3.76 (d) 0.376
  9. 9.0.49 × 2 — where does the decimal point go? (a) 0.98 (b) 9.8 (c) 0.098 (d) 0.0098
  10. 10.6.6 × 0.7 — where does the decimal point go? (a) 4.62 (b) 0.462 (c) 0.0462 (d) 46.2
  11. 11.0.61 × 4 — where does the decimal point go? (a) 0.244 (b) 2.44 (c) 0.0244 (d) 24.4
  12. 12.0.59 × 35 — where does the decimal point go? (a) 2.065 (b) 206.5 (c) 0.2065 (d) 20.65
  13. 13.0.96 × 1.2 — where does the decimal point go? (a) 0.01152 (b) 0.1152 (c) 11.52 (d) 1.152
  14. 14.0.49 × 0.7 — where does the decimal point go? (a) 0.343 (b) 3.43 (c) 0.0343 (d) 0.00343
  15. 15.0.17 × 0.2 — where does the decimal point go? (a) 0.0034 (b) 0.034 (c) 0.00034 (d) 0.34
  16. 16.3.7 × 0.3 — where does the decimal point go? (a) 0.0111 (b) 11.1 (c) 0.111 (d) 1.11
  17. 17.7.5 × 0.3 — where does the decimal point go? (a) 0.225 (b) 0.0225 (c) 22.5 (d) 2.25
  18. 18.9.8 × 3.2 — where does the decimal point go? (a) 31.36 (b) 3.136 (c) 0.3136 (d) 313.6
  19. 19.4.5 × 9 — where does the decimal point go? (a) 40.5 (b) 0.405 (c) 405 (d) 4.05
  20. 20.6.2 × 12 — where does the decimal point go? (a) 7.44 (b) 74.4 (c) 744 (d) 0.744
  21. 21.2.5 × 3 — where does the decimal point go? (a) 0.075 (b) 7.5 (c) 75 (d) 0.75
  22. 22.6.2 × 6 — where does the decimal point go? (a) 37.2 (b) 3.72 (c) 0.372 (d) 372
  23. 23.8.2 × 0.8 — where does the decimal point go? (a) 0.656 (b) 0.0656 (c) 6.56 (d) 65.6
  24. 24.0.23 × 3 — where does the decimal point go? (a) 6.9 (b) 0.69 (c) 0.0069 (d) 0.069
  25. 25.0.81 × 5 — where does the decimal point go? (a) 0.0405 (b) 40.5 (c) 4.05 (d) 0.405
  26. 26.5.6 × 3 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 168 (d) 16.8
  27. 27.5.7 × 5 — where does the decimal point go? (a) 0.285 (b) 2.85 (c) 28.5 (d) 285
  28. 28.0.26 × 7 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 0.182 (d) 18.2
  29. 29.0.44 × 0.6 — where does the decimal point go? (a) 0.00264 (b) 0.264 (c) 2.64 (d) 0.0264
  30. 30.0.69 × 3.5 — where does the decimal point go? (a) 2.415 (b) 0.2415 (c) 24.15 (d) 0.02415
  31. 31.6.8 × 4.6 — where does the decimal point go? (a) 31.28 (b) 312.8 (c) 3.128 (d) 0.3128
  32. 32.9.8 × 2.2 — where does the decimal point go? (a) 2.156 (b) 21.56 (c) 215.6 (d) 0.2156
  33. 33.2.3 × 5 — where does the decimal point go? (a) 11.5 (b) 0.115 (c) 1.15 (d) 115
  34. 34.0.36 × 9 — where does the decimal point go? (a) 0.324 (b) 32.4 (c) 3.24 (d) 0.0324
  35. 35.0.58 × 0.9 — where does the decimal point go? (a) 0.00522 (b) 0.0522 (c) 0.522 (d) 5.22
  36. 36.0.24 × 19 — where does the decimal point go? (a) 4.56 (b) 0.0456 (c) 45.6 (d) 0.456
  37. 37.3.4 × 6 — where does the decimal point go? (a) 0.204 (b) 20.4 (c) 2.04 (d) 204
  38. 38.0.93 × 4 — where does the decimal point go? (a) 37.2 (b) 3.72 (c) 0.0372 (d) 0.372
  39. 39.4.3 × 4.4 — where does the decimal point go? (a) 18.92 (b) 189.2 (c) 0.1892 (d) 1.892
  40. 40.0.66 × 0.6 — where does the decimal point go? (a) 0.00396 (b) 0.396 (c) 0.0396 (d) 3.96

Answer key

  1. 3.43
  2. 5.76
  3. 9.24
  4. 160.2
  5. 18.36
  6. 6.08
  7. 28.32
  8. 37.6
  9. 0.98
  10. 4.62
  11. 2.44
  12. 20.65
  13. 1.152
  14. 0.343
  15. 0.034
  16. 1.11
  17. 2.25
  18. 31.36
  19. 40.5
  20. 74.4
  21. 7.5
  22. 37.2
  23. 6.56
  24. 0.69
  25. 4.05
  26. 16.8
  27. 28.5
  28. 1.82
  29. 0.264
  30. 2.415
  31. 31.28
  32. 21.56
  33. 11.5
  34. 3.24
  35. 0.522
  36. 4.56
  37. 20.4
  38. 3.72
  39. 18.92
  40. 0.396

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