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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 800 · 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. 1.6.9 × 6 — where does the decimal point go? (a) 4.14 (b) 0.414 (c) 414 (d) 41.4
  2. 2.0.12 × 0.8 — where does the decimal point go? (a) 0.096 (b) 0.00096 (c) 0.96 (d) 0.0096
  3. 3.9.7 × 2.1 — where does the decimal point go? (a) 20.37 (b) 203.7 (c) 0.2037 (d) 2.037
  4. 4.0.53 × 1.5 — where does the decimal point go? (a) 0.0795 (b) 0.795 (c) 0.00795 (d) 7.95
  5. 5.0.23 × 0.4 — where does the decimal point go? (a) 0.00092 (b) 0.92 (c) 0.092 (d) 0.0092
  6. 6.0.85 × 27 — where does the decimal point go? (a) 22.95 (b) 0.2295 (c) 2.295 (d) 229.5
  7. 7.9.8 × 49 — where does the decimal point go? (a) 48.02 (b) 4802 (c) 480.2 (d) 4.802
  8. 8.8.4 × 8 — where does the decimal point go? (a) 672 (b) 67.2 (c) 6.72 (d) 0.672
  9. 9.0.57 × 0.4 — where does the decimal point go? (a) 0.228 (b) 2.28 (c) 0.0228 (d) 0.00228
  10. 10.6.8 × 27 — where does the decimal point go? (a) 18.36 (b) 1836 (c) 1.836 (d) 183.6
  11. 11.0.86 × 9 — where does the decimal point go? (a) 77.4 (b) 7.74 (c) 0.774 (d) 0.0774
  12. 12.2.6 × 22 — where does the decimal point go? (a) 5.72 (b) 572 (c) 57.2 (d) 0.572
  13. 13.9.2 × 0.4 — where does the decimal point go? (a) 0.0368 (b) 3.68 (c) 36.8 (d) 0.368
  14. 14.1.3 × 5 — where does the decimal point go? (a) 6.5 (b) 0.065 (c) 0.65 (d) 65
  15. 15.2.9 × 1.8 — where does the decimal point go? (a) 0.522 (b) 0.0522 (c) 5.22 (d) 52.2
  16. 16.0.44 × 0.6 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 2.64 (d) 0.00264
  17. 17.0.29 × 4 — where does the decimal point go? (a) 11.6 (b) 0.116 (c) 0.0116 (d) 1.16
  18. 18.3.5 × 23 — where does the decimal point go? (a) 0.805 (b) 80.5 (c) 8.05 (d) 805
  19. 19.5.4 × 13 — where does the decimal point go? (a) 70.2 (b) 7.02 (c) 0.702 (d) 702
  20. 20.0.83 × 0.5 — where does the decimal point go? (a) 0.00415 (b) 4.15 (c) 0.0415 (d) 0.415
  21. 21.4.8 × 3 — where does the decimal point go? (a) 144 (b) 1.44 (c) 0.144 (d) 14.4
  22. 22.0.88 × 8 — where does the decimal point go? (a) 0.704 (b) 0.0704 (c) 7.04 (d) 70.4
  23. 23.0.83 × 9 — where does the decimal point go? (a) 0.0747 (b) 7.47 (c) 74.7 (d) 0.747
  24. 24.6.1 × 7 — where does the decimal point go? (a) 0.427 (b) 42.7 (c) 427 (d) 4.27
  25. 25.8.2 × 0.7 — where does the decimal point go? (a) 5.74 (b) 0.574 (c) 57.4 (d) 0.0574
  26. 26.0.64 × 1.4 — where does the decimal point go? (a) 0.00896 (b) 8.96 (c) 0.0896 (d) 0.896
  27. 27.0.24 × 0.3 — where does the decimal point go? (a) 0.072 (b) 0.00072 (c) 0.72 (d) 0.0072
  28. 28.7.4 × 0.3 — where does the decimal point go? (a) 0.222 (b) 2.22 (c) 0.0222 (d) 22.2
  29. 29.0.33 × 8 — where does the decimal point go? (a) 0.0264 (b) 0.264 (c) 2.64 (d) 26.4
  30. 30.0.23 × 7 — where does the decimal point go? (a) 1.61 (b) 0.0161 (c) 0.161 (d) 16.1
  31. 31.0.34 × 8 — where does the decimal point go? (a) 2.72 (b) 0.0272 (c) 0.272 (d) 27.2
  32. 32.8.5 × 5 — where does the decimal point go? (a) 0.425 (b) 425 (c) 4.25 (d) 42.5
  33. 33.0.57 × 0.7 — where does the decimal point go? (a) 3.99 (b) 0.0399 (c) 0.399 (d) 0.00399
  34. 34.7.5 × 3 — where does the decimal point go? (a) 0.225 (b) 22.5 (c) 225 (d) 2.25
  35. 35.0.85 × 0.5 — where does the decimal point go? (a) 0.425 (b) 0.0425 (c) 4.25 (d) 0.00425
  36. 36.4.7 × 33 — where does the decimal point go? (a) 15.51 (b) 155.1 (c) 1551 (d) 1.551
  37. 37.5.3 × 3 — where does the decimal point go? (a) 1.59 (b) 0.159 (c) 15.9 (d) 159
  38. 38.0.26 × 0.4 — where does the decimal point go? (a) 1.04 (b) 0.104 (c) 0.0104 (d) 0.00104
  39. 39.0.36 × 0.8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.00288 (d) 0.0288
  40. 40.5.1 × 6 — where does the decimal point go? (a) 0.306 (b) 306 (c) 3.06 (d) 30.6

Answer key

  1. 41.4
  2. 0.096
  3. 20.37
  4. 0.795
  5. 0.092
  6. 22.95
  7. 480.2
  8. 67.2
  9. 0.228
  10. 183.6
  11. 7.74
  12. 57.2
  13. 3.68
  14. 6.5
  15. 5.22
  16. 0.264
  17. 1.16
  18. 80.5
  19. 70.2
  20. 0.415
  21. 14.4
  22. 7.04
  23. 7.47
  24. 42.7
  25. 5.74
  26. 0.896
  27. 0.072
  28. 2.22
  29. 2.64
  30. 1.61
  31. 2.72
  32. 42.5
  33. 0.399
  34. 22.5
  35. 0.425
  36. 155.1
  37. 15.9
  38. 0.104
  39. 0.288
  40. 30.6

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