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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 120 · 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. 1.5.1 × 0.2 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 0.0102 (d) 0.102
  2. 2.5.9 × 33 — where does the decimal point go? (a) 1.947 (b) 1947 (c) 19.47 (d) 194.7
  3. 3.2.7 × 18 — where does the decimal point go? (a) 486 (b) 4.86 (c) 48.6 (d) 0.486
  4. 4.8.8 × 18 — where does the decimal point go? (a) 15.84 (b) 1.584 (c) 158.4 (d) 1584
  5. 5.9.2 × 36 — where does the decimal point go? (a) 33.12 (b) 3312 (c) 331.2 (d) 3.312
  6. 6.0.29 × 9 — where does the decimal point go? (a) 0.261 (b) 0.0261 (c) 26.1 (d) 2.61
  7. 7.0.92 × 0.8 — where does the decimal point go? (a) 0.736 (b) 7.36 (c) 0.0736 (d) 0.00736
  8. 8.0.91 × 0.3 — where does the decimal point go? (a) 0.00273 (b) 2.73 (c) 0.273 (d) 0.0273
  9. 9.7.3 × 38 — where does the decimal point go? (a) 2774 (b) 27.74 (c) 2.774 (d) 277.4
  10. 10.4.3 × 8 — where does the decimal point go? (a) 344 (b) 3.44 (c) 34.4 (d) 0.344
  11. 11.7.8 × 0.6 — where does the decimal point go? (a) 0.0468 (b) 46.8 (c) 4.68 (d) 0.468
  12. 12.7.7 × 2 — where does the decimal point go? (a) 0.154 (b) 15.4 (c) 154 (d) 1.54
  13. 13.0.77 × 35 — where does the decimal point go? (a) 269.5 (b) 2.695 (c) 0.2695 (d) 26.95
  14. 14.2.9 × 0.3 — where does the decimal point go? (a) 8.7 (b) 0.087 (c) 0.0087 (d) 0.87
  15. 15.3.2 × 4.7 — where does the decimal point go? (a) 15.04 (b) 0.1504 (c) 1.504 (d) 150.4
  16. 16.8.9 × 8 — where does the decimal point go? (a) 7.12 (b) 0.712 (c) 71.2 (d) 712
  17. 17.5.8 × 18 — where does the decimal point go? (a) 1044 (b) 104.4 (c) 1.044 (d) 10.44
  18. 18.0.17 × 3 — where does the decimal point go? (a) 0.51 (b) 0.0051 (c) 5.1 (d) 0.051
  19. 19.0.18 × 27 — where does the decimal point go? (a) 0.486 (b) 0.0486 (c) 4.86 (d) 48.6
  20. 20.0.66 × 26 — where does the decimal point go? (a) 17.16 (b) 1.716 (c) 171.6 (d) 0.1716
  21. 21.0.88 × 8 — where does the decimal point go? (a) 7.04 (b) 70.4 (c) 0.704 (d) 0.0704
  22. 22.0.87 × 0.5 — where does the decimal point go? (a) 0.00435 (b) 0.0435 (c) 0.435 (d) 4.35
  23. 23.0.77 × 2.6 — where does the decimal point go? (a) 2.002 (b) 20.02 (c) 0.2002 (d) 0.02002
  24. 24.0.29 × 22 — where does the decimal point go? (a) 0.638 (b) 63.8 (c) 0.0638 (d) 6.38
  25. 25.2.7 × 5 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 135 (d) 0.135
  26. 26.1.4 × 0.6 — where does the decimal point go? (a) 0.0084 (b) 0.84 (c) 0.084 (d) 8.4
  27. 27.9.7 × 0.6 — where does the decimal point go? (a) 0.582 (b) 5.82 (c) 0.0582 (d) 58.2
  28. 28.9.4 × 0.6 — where does the decimal point go? (a) 56.4 (b) 0.0564 (c) 0.564 (d) 5.64
  29. 29.4.8 × 7 — where does the decimal point go? (a) 3.36 (b) 33.6 (c) 336 (d) 0.336
  30. 30.3.1 × 19 — where does the decimal point go? (a) 58.9 (b) 589 (c) 5.89 (d) 0.589
  31. 31.0.94 × 2 — where does the decimal point go? (a) 0.188 (b) 0.0188 (c) 18.8 (d) 1.88
  32. 32.2.8 × 1.4 — where does the decimal point go? (a) 39.2 (b) 0.0392 (c) 0.392 (d) 3.92
  33. 33.4.3 × 0.9 — where does the decimal point go? (a) 38.7 (b) 0.387 (c) 0.0387 (d) 3.87
  34. 34.0.39 × 1.4 — where does the decimal point go? (a) 0.546 (b) 0.0546 (c) 5.46 (d) 0.00546
  35. 35.0.16 × 0.2 — where does the decimal point go? (a) 0.032 (b) 0.00032 (c) 0.32 (d) 0.0032
  36. 36.0.33 × 0.3 — where does the decimal point go? (a) 0.99 (b) 0.00099 (c) 0.0099 (d) 0.099
  37. 37.4.8 × 2.3 — where does the decimal point go? (a) 1.104 (b) 110.4 (c) 11.04 (d) 0.1104
  38. 38.0.49 × 4 — where does the decimal point go? (a) 0.0196 (b) 0.196 (c) 1.96 (d) 19.6
  39. 39.7.1 × 2.9 — where does the decimal point go? (a) 205.9 (b) 20.59 (c) 0.2059 (d) 2.059
  40. 40.4.1 × 0.4 — where does the decimal point go? (a) 1.64 (b) 0.0164 (c) 0.164 (d) 16.4

Answer key

  1. 1.02
  2. 194.7
  3. 48.6
  4. 158.4
  5. 331.2
  6. 2.61
  7. 0.736
  8. 0.273
  9. 277.4
  10. 34.4
  11. 4.68
  12. 15.4
  13. 26.95
  14. 0.87
  15. 15.04
  16. 71.2
  17. 104.4
  18. 0.51
  19. 4.86
  20. 17.16
  21. 7.04
  22. 0.435
  23. 2.002
  24. 6.38
  25. 13.5
  26. 0.84
  27. 5.82
  28. 5.64
  29. 33.6
  30. 58.9
  31. 1.88
  32. 3.92
  33. 3.87
  34. 0.546
  35. 0.032
  36. 0.099
  37. 11.04
  38. 1.96
  39. 20.59
  40. 1.64

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