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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 816 · 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. 1.1.8 × 6 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 108 (d) 10.8
  2. 2.0.23 × 31 — where does the decimal point go? (a) 0.713 (b) 71.3 (c) 0.0713 (d) 7.13
  3. 3.7.8 × 0.2 — where does the decimal point go? (a) 0.0156 (b) 15.6 (c) 0.156 (d) 1.56
  4. 4.2.9 × 2 — where does the decimal point go? (a) 5.8 (b) 0.058 (c) 58 (d) 0.58
  5. 5.7.7 × 1.5 — where does the decimal point go? (a) 115.5 (b) 1.155 (c) 11.55 (d) 0.1155
  6. 6.0.59 × 38 — where does the decimal point go? (a) 224.2 (b) 2.242 (c) 22.42 (d) 0.2242
  7. 7.5.1 × 0.4 — where does the decimal point go? (a) 0.0204 (b) 2.04 (c) 0.204 (d) 20.4
  8. 8.0.77 × 0.4 — where does the decimal point go? (a) 0.308 (b) 0.0308 (c) 0.00308 (d) 3.08
  9. 9.1.8 × 4.9 — where does the decimal point go? (a) 0.0882 (b) 88.2 (c) 0.882 (d) 8.82
  10. 10.3.8 × 49 — where does the decimal point go? (a) 186.2 (b) 1.862 (c) 1862 (d) 18.62
  11. 11.0.71 × 9 — where does the decimal point go? (a) 63.9 (b) 0.639 (c) 6.39 (d) 0.0639
  12. 12.3.9 × 4 — where does the decimal point go? (a) 0.156 (b) 15.6 (c) 1.56 (d) 156
  13. 13.8.9 × 4.2 — where does the decimal point go? (a) 373.8 (b) 3.738 (c) 0.3738 (d) 37.38
  14. 14.0.13 × 3.4 — where does the decimal point go? (a) 0.442 (b) 4.42 (c) 0.00442 (d) 0.0442
  15. 15.4.1 × 2.2 — where does the decimal point go? (a) 9.02 (b) 0.902 (c) 0.0902 (d) 90.2
  16. 16.0.41 × 4 — where does the decimal point go? (a) 0.0164 (b) 0.164 (c) 16.4 (d) 1.64
  17. 17.9.5 × 9 — where does the decimal point go? (a) 0.855 (b) 8.55 (c) 855 (d) 85.5
  18. 18.3.7 × 26 — where does the decimal point go? (a) 96.2 (b) 9.62 (c) 0.962 (d) 962
  19. 19.2.9 × 1.3 — where does the decimal point go? (a) 3.77 (b) 0.377 (c) 0.0377 (d) 37.7
  20. 20.2.4 × 0.4 — where does the decimal point go? (a) 0.096 (b) 0.96 (c) 0.0096 (d) 9.6
  21. 21.0.32 × 8 — where does the decimal point go? (a) 0.0256 (b) 2.56 (c) 0.256 (d) 25.6
  22. 22.0.77 × 0.8 — where does the decimal point go? (a) 0.0616 (b) 0.00616 (c) 6.16 (d) 0.616
  23. 23.2.8 × 11 — where does the decimal point go? (a) 3.08 (b) 0.308 (c) 30.8 (d) 308
  24. 24.0.72 × 6 — where does the decimal point go? (a) 4.32 (b) 0.432 (c) 0.0432 (d) 43.2
  25. 25.0.58 × 6 — where does the decimal point go? (a) 34.8 (b) 3.48 (c) 0.348 (d) 0.0348
  26. 26.4.7 × 1.3 — where does the decimal point go? (a) 6.11 (b) 0.611 (c) 61.1 (d) 0.0611
  27. 27.1.4 × 0.4 — where does the decimal point go? (a) 0.056 (b) 0.0056 (c) 5.6 (d) 0.56
  28. 28.3.2 × 12 — where does the decimal point go? (a) 384 (b) 0.384 (c) 3.84 (d) 38.4
  29. 29.9.2 × 9 — where does the decimal point go? (a) 0.828 (b) 8.28 (c) 828 (d) 82.8
  30. 30.0.23 × 0.6 — where does the decimal point go? (a) 0.138 (b) 1.38 (c) 0.0138 (d) 0.00138
  31. 31.0.68 × 2 — where does the decimal point go? (a) 1.36 (b) 13.6 (c) 0.0136 (d) 0.136
  32. 32.3.3 × 0.7 — where does the decimal point go? (a) 23.1 (b) 2.31 (c) 0.0231 (d) 0.231
  33. 33.4.1 × 9 — where does the decimal point go? (a) 0.369 (b) 369 (c) 3.69 (d) 36.9
  34. 34.0.42 × 0.6 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 0.00252 (d) 2.52
  35. 35.0.68 × 4 — where does the decimal point go? (a) 2.72 (b) 27.2 (c) 0.272 (d) 0.0272
  36. 36.0.53 × 49 — where does the decimal point go? (a) 25.97 (b) 2.597 (c) 259.7 (d) 0.2597
  37. 37.3.3 × 7 — where does the decimal point go? (a) 0.231 (b) 2.31 (c) 23.1 (d) 231
  38. 38.0.41 × 26 — where does the decimal point go? (a) 10.66 (b) 106.6 (c) 1.066 (d) 0.1066
  39. 39.0.47 × 0.7 — where does the decimal point go? (a) 0.00329 (b) 0.0329 (c) 0.329 (d) 3.29
  40. 40.8.5 × 0.5 — where does the decimal point go? (a) 0.425 (b) 4.25 (c) 42.5 (d) 0.0425

Answer key

  1. 10.8
  2. 7.13
  3. 1.56
  4. 5.8
  5. 11.55
  6. 22.42
  7. 2.04
  8. 0.308
  9. 8.82
  10. 186.2
  11. 6.39
  12. 15.6
  13. 37.38
  14. 0.442
  15. 9.02
  16. 1.64
  17. 85.5
  18. 96.2
  19. 3.77
  20. 0.96
  21. 2.56
  22. 0.616
  23. 30.8
  24. 4.32
  25. 3.48
  26. 6.11
  27. 0.56
  28. 38.4
  29. 82.8
  30. 0.138
  31. 1.36
  32. 2.31
  33. 36.9
  34. 0.252
  35. 2.72
  36. 25.97
  37. 23.1
  38. 10.66
  39. 0.329
  40. 4.25

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