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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 387 · 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. 1.1.9 × 5 — where does the decimal point go? (a) 9.5 (b) 0.095 (c) 95 (d) 0.95
  2. 2.0.97 × 18 — where does the decimal point go? (a) 1.746 (b) 0.1746 (c) 174.6 (d) 17.46
  3. 3.3.4 × 1.8 — where does the decimal point go? (a) 6.12 (b) 0.612 (c) 0.0612 (d) 61.2
  4. 4.0.12 × 9 — where does the decimal point go? (a) 1.08 (b) 10.8 (c) 0.0108 (d) 0.108
  5. 5.8.6 × 32 — where does the decimal point go? (a) 27.52 (b) 275.2 (c) 2.752 (d) 2752
  6. 6.0.24 × 49 — where does the decimal point go? (a) 0.1176 (b) 11.76 (c) 117.6 (d) 1.176
  7. 7.0.16 × 0.4 — where does the decimal point go? (a) 0.064 (b) 0.00064 (c) 0.0064 (d) 0.64
  8. 8.1.4 × 3.7 — where does the decimal point go? (a) 51.8 (b) 5.18 (c) 0.518 (d) 0.0518
  9. 9.0.77 × 2 — where does the decimal point go? (a) 15.4 (b) 0.0154 (c) 1.54 (d) 0.154
  10. 10.2.4 × 0.3 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 0.0072 (d) 7.2
  11. 11.1.6 × 0.8 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 0.0128 (d) 1.28
  12. 12.0.46 × 6 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 27.6 (d) 0.0276
  13. 13.8.5 × 3.1 — where does the decimal point go? (a) 2.635 (b) 263.5 (c) 0.2635 (d) 26.35
  14. 14.0.84 × 0.7 — where does the decimal point go? (a) 0.00588 (b) 5.88 (c) 0.0588 (d) 0.588
  15. 15.7.1 × 2.9 — where does the decimal point go? (a) 20.59 (b) 0.2059 (c) 2.059 (d) 205.9
  16. 16.3.9 × 0.2 — where does the decimal point go? (a) 0.78 (b) 0.0078 (c) 0.078 (d) 7.8
  17. 17.0.33 × 4 — where does the decimal point go? (a) 0.132 (b) 0.0132 (c) 1.32 (d) 13.2
  18. 18.0.54 × 0.7 — where does the decimal point go? (a) 0.378 (b) 0.0378 (c) 3.78 (d) 0.00378
  19. 19.0.17 × 26 — where does the decimal point go? (a) 4.42 (b) 0.0442 (c) 0.442 (d) 44.2
  20. 20.8.8 × 4 — where does the decimal point go? (a) 352 (b) 3.52 (c) 0.352 (d) 35.2
  21. 21.0.66 × 0.3 — where does the decimal point go? (a) 0.0198 (b) 0.00198 (c) 1.98 (d) 0.198
  22. 22.0.54 × 4 — where does the decimal point go? (a) 0.0216 (b) 2.16 (c) 21.6 (d) 0.216
  23. 23.5.9 × 2.6 — where does the decimal point go? (a) 15.34 (b) 153.4 (c) 1.534 (d) 0.1534
  24. 24.2.6 × 9 — where does the decimal point go? (a) 2.34 (b) 234 (c) 0.234 (d) 23.4
  25. 25.3.4 × 8 — where does the decimal point go? (a) 2.72 (b) 272 (c) 0.272 (d) 27.2
  26. 26.0.99 × 43 — where does the decimal point go? (a) 42.57 (b) 425.7 (c) 0.4257 (d) 4.257
  27. 27.0.13 × 2.4 — where does the decimal point go? (a) 3.12 (b) 0.00312 (c) 0.312 (d) 0.0312
  28. 28.6.9 × 4.7 — where does the decimal point go? (a) 3.243 (b) 32.43 (c) 0.3243 (d) 324.3
  29. 29.0.83 × 0.2 — where does the decimal point go? (a) 0.166 (b) 0.00166 (c) 0.0166 (d) 1.66
  30. 30.3.8 × 24 — where does the decimal point go? (a) 9.12 (b) 0.912 (c) 912 (d) 91.2
  31. 31.0.93 × 4 — where does the decimal point go? (a) 0.0372 (b) 3.72 (c) 0.372 (d) 37.2
  32. 32.2.4 × 7 — where does the decimal point go? (a) 0.168 (b) 168 (c) 16.8 (d) 1.68
  33. 33.5.2 × 8 — where does the decimal point go? (a) 41.6 (b) 4.16 (c) 0.416 (d) 416
  34. 34.0.43 × 3.9 — where does the decimal point go? (a) 1.677 (b) 16.77 (c) 0.1677 (d) 0.01677
  35. 35.7.1 × 8 — where does the decimal point go? (a) 56.8 (b) 5.68 (c) 568 (d) 0.568
  36. 36.2.6 × 19 — where does the decimal point go? (a) 49.4 (b) 0.494 (c) 494 (d) 4.94
  37. 37.0.81 × 9 — where does the decimal point go? (a) 7.29 (b) 0.0729 (c) 72.9 (d) 0.729
  38. 38.0.31 × 5 — where does the decimal point go? (a) 0.0155 (b) 15.5 (c) 1.55 (d) 0.155
  39. 39.0.14 × 0.4 — where does the decimal point go? (a) 0.56 (b) 0.056 (c) 0.00056 (d) 0.0056
  40. 40.9.8 × 0.7 — where does the decimal point go? (a) 68.6 (b) 6.86 (c) 0.0686 (d) 0.686

Answer key

  1. 9.5
  2. 17.46
  3. 6.12
  4. 1.08
  5. 275.2
  6. 11.76
  7. 0.064
  8. 5.18
  9. 1.54
  10. 0.72
  11. 1.28
  12. 2.76
  13. 26.35
  14. 0.588
  15. 20.59
  16. 0.78
  17. 1.32
  18. 0.378
  19. 4.42
  20. 35.2
  21. 0.198
  22. 2.16
  23. 15.34
  24. 23.4
  25. 27.2
  26. 42.57
  27. 0.312
  28. 32.43
  29. 0.166
  30. 91.2
  31. 3.72
  32. 16.8
  33. 41.6
  34. 1.677
  35. 56.8
  36. 49.4
  37. 7.29
  38. 1.55
  39. 0.056
  40. 6.86

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