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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 695 · 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. 1.0.97 × 18 — where does the decimal point go? (a) 0.1746 (b) 1.746 (c) 17.46 (d) 174.6
  2. 2.5.1 × 2 — where does the decimal point go? (a) 102 (b) 0.102 (c) 10.2 (d) 1.02
  3. 3.0.87 × 6 — where does the decimal point go? (a) 5.22 (b) 0.522 (c) 0.0522 (d) 52.2
  4. 4.4.1 × 8 — where does the decimal point go? (a) 0.328 (b) 3.28 (c) 32.8 (d) 328
  5. 5.0.84 × 44 — where does the decimal point go? (a) 0.3696 (b) 36.96 (c) 3.696 (d) 369.6
  6. 6.4.1 × 0.8 — where does the decimal point go? (a) 3.28 (b) 0.0328 (c) 0.328 (d) 32.8
  7. 7.1.3 × 19 — where does the decimal point go? (a) 2.47 (b) 24.7 (c) 0.247 (d) 247
  8. 8.2.5 × 9 — where does the decimal point go? (a) 22.5 (b) 2.25 (c) 225 (d) 0.225
  9. 9.5.1 × 0.2 — where does the decimal point go? (a) 0.0102 (b) 10.2 (c) 0.102 (d) 1.02
  10. 10.8.3 × 3.8 — where does the decimal point go? (a) 31.54 (b) 3.154 (c) 0.3154 (d) 315.4
  11. 11.2.9 × 46 — where does the decimal point go? (a) 1334 (b) 133.4 (c) 13.34 (d) 1.334
  12. 12.0.71 × 9 — where does the decimal point go? (a) 6.39 (b) 0.0639 (c) 0.639 (d) 63.9
  13. 13.8.6 × 4.3 — where does the decimal point go? (a) 3.698 (b) 0.3698 (c) 36.98 (d) 369.8
  14. 14.0.98 × 7 — where does the decimal point go? (a) 6.86 (b) 68.6 (c) 0.686 (d) 0.0686
  15. 15.0.43 × 0.2 — where does the decimal point go? (a) 0.086 (b) 0.00086 (c) 0.86 (d) 0.0086
  16. 16.0.23 × 0.7 — where does the decimal point go? (a) 1.61 (b) 0.161 (c) 0.0161 (d) 0.00161
  17. 17.6.4 × 0.4 — where does the decimal point go? (a) 2.56 (b) 25.6 (c) 0.256 (d) 0.0256
  18. 18.0.98 × 2 — where does the decimal point go? (a) 19.6 (b) 0.196 (c) 1.96 (d) 0.0196
  19. 19.8.4 × 0.2 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 0.0168
  20. 20.3.1 × 5 — where does the decimal point go? (a) 15.5 (b) 1.55 (c) 155 (d) 0.155
  21. 21.0.32 × 6 — where does the decimal point go? (a) 0.192 (b) 1.92 (c) 19.2 (d) 0.0192
  22. 22.3.3 × 8 — where does the decimal point go? (a) 0.264 (b) 264 (c) 26.4 (d) 2.64
  23. 23.1.9 × 33 — where does the decimal point go? (a) 6.27 (b) 0.627 (c) 627 (d) 62.7
  24. 24.9.8 × 3 — where does the decimal point go? (a) 2.94 (b) 0.294 (c) 294 (d) 29.4
  25. 25.1.9 × 6 — where does the decimal point go? (a) 114 (b) 11.4 (c) 1.14 (d) 0.114
  26. 26.0.71 × 1.3 — where does the decimal point go? (a) 0.923 (b) 0.0923 (c) 9.23 (d) 0.00923
  27. 27.0.34 × 33 — where does the decimal point go? (a) 1.122 (b) 11.22 (c) 0.1122 (d) 112.2
  28. 28.6.3 × 2.6 — where does the decimal point go? (a) 0.1638 (b) 1.638 (c) 16.38 (d) 163.8
  29. 29.1.2 × 1.7 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 0.0204 (d) 20.4
  30. 30.0.19 × 49 — where does the decimal point go? (a) 9.31 (b) 0.0931 (c) 0.931 (d) 93.1
  31. 31.0.32 × 4 — where does the decimal point go? (a) 1.28 (b) 0.128 (c) 12.8 (d) 0.0128
  32. 32.1.3 × 2.1 — where does the decimal point go? (a) 0.0273 (b) 2.73 (c) 0.273 (d) 27.3
  33. 33.8.4 × 4 — where does the decimal point go? (a) 0.336 (b) 336 (c) 3.36 (d) 33.6
  34. 34.2.9 × 1.3 — where does the decimal point go? (a) 3.77 (b) 37.7 (c) 0.377 (d) 0.0377
  35. 35.1.6 × 32 — where does the decimal point go? (a) 0.512 (b) 51.2 (c) 512 (d) 5.12
  36. 36.0.53 × 7 — where does the decimal point go? (a) 37.1 (b) 0.371 (c) 0.0371 (d) 3.71
  37. 37.0.81 × 9 — where does the decimal point go? (a) 0.0729 (b) 72.9 (c) 0.729 (d) 7.29
  38. 38.8.3 × 4.4 — where does the decimal point go? (a) 36.52 (b) 365.2 (c) 0.3652 (d) 3.652
  39. 39.9.6 × 4.6 — where does the decimal point go? (a) 44.16 (b) 0.4416 (c) 4.416 (d) 441.6
  40. 40.0.25 × 1.3 — where does the decimal point go? (a) 0.00325 (b) 0.325 (c) 3.25 (d) 0.0325

Answer key

  1. 17.46
  2. 10.2
  3. 5.22
  4. 32.8
  5. 36.96
  6. 3.28
  7. 24.7
  8. 22.5
  9. 1.02
  10. 31.54
  11. 133.4
  12. 6.39
  13. 36.98
  14. 6.86
  15. 0.086
  16. 0.161
  17. 2.56
  18. 1.96
  19. 1.68
  20. 15.5
  21. 1.92
  22. 26.4
  23. 62.7
  24. 29.4
  25. 11.4
  26. 0.923
  27. 11.22
  28. 16.38
  29. 2.04
  30. 9.31
  31. 1.28
  32. 2.73
  33. 33.6
  34. 3.77
  35. 51.2
  36. 3.71
  37. 7.29
  38. 36.52
  39. 44.16
  40. 0.325

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