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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 345 · 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. 1.7.6 × 9 — where does the decimal point go? (a) 68.4 (b) 684 (c) 6.84 (d) 0.684
  2. 2.0.54 × 14 — where does the decimal point go? (a) 0.756 (b) 0.0756 (c) 75.6 (d) 7.56
  3. 3.2.2 × 3 — where does the decimal point go? (a) 6.6 (b) 66 (c) 0.66 (d) 0.066
  4. 4.4.3 × 3.4 — where does the decimal point go? (a) 1.462 (b) 14.62 (c) 0.1462 (d) 146.2
  5. 5.0.74 × 32 — where does the decimal point go? (a) 2.368 (b) 23.68 (c) 236.8 (d) 0.2368
  6. 6.3.4 × 0.8 — where does the decimal point go? (a) 27.2 (b) 0.0272 (c) 2.72 (d) 0.272
  7. 7.3.7 × 9 — where does the decimal point go? (a) 0.333 (b) 3.33 (c) 33.3 (d) 333
  8. 8.0.26 × 3.7 — where does the decimal point go? (a) 0.0962 (b) 9.62 (c) 0.00962 (d) 0.962
  9. 9.3.7 × 3.1 — where does the decimal point go? (a) 114.7 (b) 11.47 (c) 1.147 (d) 0.1147
  10. 10.4.1 × 3.8 — where does the decimal point go? (a) 1.558 (b) 15.58 (c) 0.1558 (d) 155.8
  11. 11.3.3 × 0.5 — where does the decimal point go? (a) 0.165 (b) 1.65 (c) 16.5 (d) 0.0165
  12. 12.9.6 × 4 — where does the decimal point go? (a) 3.84 (b) 0.384 (c) 38.4 (d) 384
  13. 13.0.21 × 3.7 — where does the decimal point go? (a) 0.777 (b) 7.77 (c) 0.0777 (d) 0.00777
  14. 14.1.7 × 0.3 — where does the decimal point go? (a) 5.1 (b) 0.51 (c) 0.0051 (d) 0.051
  15. 15.0.81 × 2 — where does the decimal point go? (a) 1.62 (b) 0.162 (c) 0.0162 (d) 16.2
  16. 16.0.79 × 0.4 — where does the decimal point go? (a) 0.0316 (b) 3.16 (c) 0.316 (d) 0.00316
  17. 17.0.51 × 31 — where does the decimal point go? (a) 15.81 (b) 0.1581 (c) 1.581 (d) 158.1
  18. 18.0.33 × 8 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 26.4 (d) 0.264
  19. 19.2.9 × 0.7 — where does the decimal point go? (a) 0.203 (b) 20.3 (c) 2.03 (d) 0.0203
  20. 20.6.3 × 1.4 — where does the decimal point go? (a) 0.882 (b) 8.82 (c) 0.0882 (d) 88.2
  21. 21.0.13 × 1.9 — where does the decimal point go? (a) 0.00247 (b) 2.47 (c) 0.0247 (d) 0.247
  22. 22.0.82 × 43 — where does the decimal point go? (a) 352.6 (b) 3.526 (c) 0.3526 (d) 35.26
  23. 23.0.83 × 7 — where does the decimal point go? (a) 0.0581 (b) 5.81 (c) 58.1 (d) 0.581
  24. 24.0.48 × 8 — where does the decimal point go? (a) 0.0384 (b) 0.384 (c) 38.4 (d) 3.84
  25. 25.0.92 × 4 — where does the decimal point go? (a) 0.368 (b) 3.68 (c) 36.8 (d) 0.0368
  26. 26.4.8 × 0.4 — where does the decimal point go? (a) 1.92 (b) 19.2 (c) 0.192 (d) 0.0192
  27. 27.9.6 × 8 — where does the decimal point go? (a) 768 (b) 0.768 (c) 7.68 (d) 76.8
  28. 28.1.7 × 8 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 136 (d) 1.36
  29. 29.1.4 × 0.9 — where does the decimal point go? (a) 12.6 (b) 0.126 (c) 0.0126 (d) 1.26
  30. 30.8.8 × 46 — where does the decimal point go? (a) 40.48 (b) 404.8 (c) 4.048 (d) 4048
  31. 31.5.4 × 23 — where does the decimal point go? (a) 1.242 (b) 124.2 (c) 12.42 (d) 1242
  32. 32.1.3 × 5 — where does the decimal point go? (a) 0.065 (b) 6.5 (c) 0.65 (d) 65
  33. 33.0.18 × 4.3 — where does the decimal point go? (a) 0.00774 (b) 0.774 (c) 7.74 (d) 0.0774
  34. 34.2.6 × 3.1 — where does the decimal point go? (a) 0.806 (b) 8.06 (c) 80.6 (d) 0.0806
  35. 35.0.22 × 2.4 — where does the decimal point go? (a) 0.00528 (b) 0.528 (c) 5.28 (d) 0.0528
  36. 36.0.64 × 4 — where does the decimal point go? (a) 0.0256 (b) 0.256 (c) 25.6 (d) 2.56
  37. 37.0.64 × 8 — where does the decimal point go? (a) 51.2 (b) 0.512 (c) 5.12 (d) 0.0512
  38. 38.4.1 × 12 — where does the decimal point go? (a) 49.2 (b) 492 (c) 0.492 (d) 4.92
  39. 39.8.8 × 31 — where does the decimal point go? (a) 272.8 (b) 2728 (c) 27.28 (d) 2.728
  40. 40.8.5 × 0.3 — where does the decimal point go? (a) 0.0255 (b) 2.55 (c) 25.5 (d) 0.255

Answer key

  1. 68.4
  2. 7.56
  3. 6.6
  4. 14.62
  5. 23.68
  6. 2.72
  7. 33.3
  8. 0.962
  9. 11.47
  10. 15.58
  11. 1.65
  12. 38.4
  13. 0.777
  14. 0.51
  15. 1.62
  16. 0.316
  17. 15.81
  18. 2.64
  19. 2.03
  20. 8.82
  21. 0.247
  22. 35.26
  23. 5.81
  24. 3.84
  25. 3.68
  26. 1.92
  27. 76.8
  28. 13.6
  29. 1.26
  30. 404.8
  31. 124.2
  32. 6.5
  33. 0.774
  34. 8.06
  35. 0.528
  36. 2.56
  37. 5.12
  38. 49.2
  39. 272.8
  40. 2.55

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