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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 243 · 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. 1.0.25 × 17 — where does the decimal point go? (a) 0.0425 (b) 0.425 (c) 42.5 (d) 4.25
  2. 2.0.32 × 3 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 9.6 (d) 0.096
  3. 3.0.23 × 5 — where does the decimal point go? (a) 11.5 (b) 0.115 (c) 0.0115 (d) 1.15
  4. 4.0.79 × 2.6 — where does the decimal point go? (a) 0.2054 (b) 20.54 (c) 0.02054 (d) 2.054
  5. 5.0.32 × 6 — where does the decimal point go? (a) 1.92 (b) 0.0192 (c) 19.2 (d) 0.192
  6. 6.0.38 × 0.9 — where does the decimal point go? (a) 0.00342 (b) 3.42 (c) 0.0342 (d) 0.342
  7. 7.6.4 × 37 — where does the decimal point go? (a) 2368 (b) 236.8 (c) 2.368 (d) 23.68
  8. 8.2.6 × 36 — where does the decimal point go? (a) 0.936 (b) 9.36 (c) 936 (d) 93.6
  9. 9.0.74 × 11 — where does the decimal point go? (a) 8.14 (b) 0.0814 (c) 0.814 (d) 81.4
  10. 10.8.7 × 1.8 — where does the decimal point go? (a) 0.1566 (b) 156.6 (c) 15.66 (d) 1.566
  11. 11.4.2 × 14 — where does the decimal point go? (a) 588 (b) 5.88 (c) 58.8 (d) 0.588
  12. 12.3.6 × 48 — where does the decimal point go? (a) 172.8 (b) 17.28 (c) 1728 (d) 1.728
  13. 13.5.7 × 4.4 — where does the decimal point go? (a) 25.08 (b) 2.508 (c) 0.2508 (d) 250.8
  14. 14.1.7 × 1.6 — where does the decimal point go? (a) 0.272 (b) 0.0272 (c) 27.2 (d) 2.72
  15. 15.7.1 × 42 — where does the decimal point go? (a) 298.2 (b) 2982 (c) 2.982 (d) 29.82
  16. 16.1.9 × 7 — where does the decimal point go? (a) 1.33 (b) 133 (c) 13.3 (d) 0.133
  17. 17.0.59 × 8 — where does the decimal point go? (a) 4.72 (b) 0.472 (c) 47.2 (d) 0.0472
  18. 18.1.7 × 4 — where does the decimal point go? (a) 6.8 (b) 0.068 (c) 68 (d) 0.68
  19. 19.5.9 × 19 — where does the decimal point go? (a) 1121 (b) 11.21 (c) 112.1 (d) 1.121
  20. 20.4.6 × 11 — where does the decimal point go? (a) 506 (b) 0.506 (c) 5.06 (d) 50.6
  21. 21.7.5 × 3 — where does the decimal point go? (a) 22.5 (b) 2.25 (c) 225 (d) 0.225
  22. 22.0.47 × 5 — where does the decimal point go? (a) 23.5 (b) 0.0235 (c) 2.35 (d) 0.235
  23. 23.2.1 × 1.1 — where does the decimal point go? (a) 2.31 (b) 0.0231 (c) 0.231 (d) 23.1
  24. 24.0.46 × 0.9 — where does the decimal point go? (a) 0.0414 (b) 4.14 (c) 0.00414 (d) 0.414
  25. 25.0.72 × 4.1 — where does the decimal point go? (a) 0.2952 (b) 2.952 (c) 29.52 (d) 0.02952
  26. 26.3.1 × 0.5 — where does the decimal point go? (a) 1.55 (b) 0.0155 (c) 15.5 (d) 0.155
  27. 27.5.1 × 9 — where does the decimal point go? (a) 0.459 (b) 4.59 (c) 45.9 (d) 459
  28. 28.4.5 × 0.9 — where does the decimal point go? (a) 0.0405 (b) 4.05 (c) 40.5 (d) 0.405
  29. 29.3.8 × 0.2 — where does the decimal point go? (a) 0.076 (b) 0.0076 (c) 7.6 (d) 0.76
  30. 30.7.1 × 21 — where does the decimal point go? (a) 149.1 (b) 1491 (c) 14.91 (d) 1.491
  31. 31.0.21 × 38 — where does the decimal point go? (a) 0.798 (b) 0.0798 (c) 7.98 (d) 79.8
  32. 32.0.36 × 0.7 — where does the decimal point go? (a) 0.0252 (b) 2.52 (c) 0.252 (d) 0.00252
  33. 33.2.6 × 0.6 — where does the decimal point go? (a) 15.6 (b) 0.156 (c) 0.0156 (d) 1.56
  34. 34.0.38 × 36 — where does the decimal point go? (a) 0.1368 (b) 136.8 (c) 13.68 (d) 1.368
  35. 35.0.71 × 0.5 — where does the decimal point go? (a) 0.355 (b) 3.55 (c) 0.0355 (d) 0.00355
  36. 36.7.3 × 9 — where does the decimal point go? (a) 657 (b) 6.57 (c) 65.7 (d) 0.657
  37. 37.5.4 × 23 — where does the decimal point go? (a) 1.242 (b) 1242 (c) 124.2 (d) 12.42
  38. 38.0.57 × 1.1 — where does the decimal point go? (a) 0.00627 (b) 6.27 (c) 0.627 (d) 0.0627
  39. 39.0.26 × 0.3 — where does the decimal point go? (a) 0.0078 (b) 0.078 (c) 0.00078 (d) 0.78
  40. 40.0.61 × 0.9 — where does the decimal point go? (a) 0.00549 (b) 0.0549 (c) 0.549 (d) 5.49

Answer key

  1. 4.25
  2. 0.96
  3. 1.15
  4. 2.054
  5. 1.92
  6. 0.342
  7. 236.8
  8. 93.6
  9. 8.14
  10. 15.66
  11. 58.8
  12. 172.8
  13. 25.08
  14. 2.72
  15. 298.2
  16. 13.3
  17. 4.72
  18. 6.8
  19. 112.1
  20. 50.6
  21. 22.5
  22. 2.35
  23. 2.31
  24. 0.414
  25. 2.952
  26. 1.55
  27. 45.9
  28. 4.05
  29. 0.76
  30. 149.1
  31. 7.98
  32. 0.252
  33. 1.56
  34. 13.68
  35. 0.355
  36. 65.7
  37. 124.2
  38. 0.627
  39. 0.078
  40. 0.549

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