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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 11 · 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. 1.0.88 × 18 — where does the decimal point go? (a) 1.584 (b) 0.1584 (c) 15.84 (d) 158.4
  2. 2.0.91 × 4.6 — where does the decimal point go? (a) 41.86 (b) 0.4186 (c) 0.04186 (d) 4.186
  3. 3.0.14 × 3.8 — where does the decimal point go? (a) 0.00532 (b) 0.532 (c) 0.0532 (d) 5.32
  4. 4.4.5 × 2.1 — where does the decimal point go? (a) 9.45 (b) 94.5 (c) 0.0945 (d) 0.945
  5. 5.0.51 × 0.4 — where does the decimal point go? (a) 2.04 (b) 0.00204 (c) 0.0204 (d) 0.204
  6. 6.8.7 × 2 — where does the decimal point go? (a) 0.174 (b) 1.74 (c) 17.4 (d) 174
  7. 7.0.61 × 2.5 — where does the decimal point go? (a) 15.25 (b) 0.1525 (c) 1.525 (d) 0.01525
  8. 8.0.46 × 4.7 — where does the decimal point go? (a) 0.02162 (b) 2.162 (c) 21.62 (d) 0.2162
  9. 9.1.8 × 1.2 — where does the decimal point go? (a) 0.0216 (b) 2.16 (c) 0.216 (d) 21.6
  10. 10.6.8 × 3.7 — where does the decimal point go? (a) 2.516 (b) 0.2516 (c) 251.6 (d) 25.16
  11. 11.9.8 × 4 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 392 (d) 0.392
  12. 12.4.8 × 0.2 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.96 (d) 0.0096
  13. 13.0.26 × 3 — where does the decimal point go? (a) 0.78 (b) 0.078 (c) 0.0078 (d) 7.8
  14. 14.8.5 × 3 — where does the decimal point go? (a) 2.55 (b) 255 (c) 0.255 (d) 25.5
  15. 15.0.85 × 3.1 — where does the decimal point go? (a) 0.2635 (b) 26.35 (c) 0.02635 (d) 2.635
  16. 16.2.6 × 0.3 — where does the decimal point go? (a) 0.078 (b) 7.8 (c) 0.0078 (d) 0.78
  17. 17.7.7 × 3.6 — where does the decimal point go? (a) 0.2772 (b) 27.72 (c) 277.2 (d) 2.772
  18. 18.5.7 × 9 — where does the decimal point go? (a) 0.513 (b) 5.13 (c) 51.3 (d) 513
  19. 19.8.5 × 0.7 — where does the decimal point go? (a) 0.595 (b) 0.0595 (c) 5.95 (d) 59.5
  20. 20.6.2 × 32 — where does the decimal point go? (a) 19.84 (b) 1.984 (c) 198.4 (d) 1984
  21. 21.3.1 × 3 — where does the decimal point go? (a) 0.93 (b) 93 (c) 9.3 (d) 0.093
  22. 22.4.3 × 0.4 — where does the decimal point go? (a) 17.2 (b) 1.72 (c) 0.172 (d) 0.0172
  23. 23.9.1 × 0.7 — where does the decimal point go? (a) 0.637 (b) 6.37 (c) 0.0637 (d) 63.7
  24. 24.2.6 × 0.4 — where does the decimal point go? (a) 0.0104 (b) 1.04 (c) 10.4 (d) 0.104
  25. 25.0.41 × 0.3 — where does the decimal point go? (a) 0.123 (b) 0.00123 (c) 1.23 (d) 0.0123
  26. 26.0.38 × 1.7 — where does the decimal point go? (a) 0.646 (b) 0.0646 (c) 0.00646 (d) 6.46
  27. 27.1.8 × 4 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 72 (d) 7.2
  28. 28.0.85 × 2.9 — where does the decimal point go? (a) 0.2465 (b) 2.465 (c) 0.02465 (d) 24.65
  29. 29.0.32 × 14 — where does the decimal point go? (a) 44.8 (b) 4.48 (c) 0.448 (d) 0.0448
  30. 30.2.4 × 8 — where does the decimal point go? (a) 19.2 (b) 0.192 (c) 192 (d) 1.92
  31. 31.2.9 × 0.3 — where does the decimal point go? (a) 0.87 (b) 8.7 (c) 0.0087 (d) 0.087
  32. 32.0.13 × 38 — where does the decimal point go? (a) 0.494 (b) 4.94 (c) 0.0494 (d) 49.4
  33. 33.2.2 × 3 — where does the decimal point go? (a) 66 (b) 6.6 (c) 0.66 (d) 0.066
  34. 34.3.3 × 8 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 264 (d) 2.64
  35. 35.0.87 × 7 — where does the decimal point go? (a) 60.9 (b) 0.609 (c) 0.0609 (d) 6.09
  36. 36.4.6 × 3 — where does the decimal point go? (a) 138 (b) 1.38 (c) 13.8 (d) 0.138
  37. 37.7.7 × 9 — where does the decimal point go? (a) 693 (b) 0.693 (c) 69.3 (d) 6.93
  38. 38.1.8 × 0.2 — where does the decimal point go? (a) 0.36 (b) 3.6 (c) 0.036 (d) 0.0036
  39. 39.6.2 × 4 — where does the decimal point go? (a) 248 (b) 2.48 (c) 0.248 (d) 24.8
  40. 40.5.2 × 4 — where does the decimal point go? (a) 0.208 (b) 208 (c) 2.08 (d) 20.8

Answer key

  1. 15.84
  2. 4.186
  3. 0.532
  4. 9.45
  5. 0.204
  6. 17.4
  7. 1.525
  8. 2.162
  9. 2.16
  10. 25.16
  11. 39.2
  12. 0.96
  13. 0.78
  14. 25.5
  15. 2.635
  16. 0.78
  17. 27.72
  18. 51.3
  19. 5.95
  20. 198.4
  21. 9.3
  22. 1.72
  23. 6.37
  24. 1.04
  25. 0.123
  26. 0.646
  27. 7.2
  28. 2.465
  29. 4.48
  30. 19.2
  31. 0.87
  32. 4.94
  33. 6.6
  34. 26.4
  35. 6.09
  36. 13.8
  37. 69.3
  38. 0.36
  39. 24.8
  40. 20.8

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