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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 474 · 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. 1.0.94 × 6 — where does the decimal point go? (a) 0.0564 (b) 5.64 (c) 56.4 (d) 0.564
  2. 2.0.52 × 0.8 — where does the decimal point go? (a) 0.00416 (b) 0.0416 (c) 4.16 (d) 0.416
  3. 3.2.8 × 4 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 112 (d) 11.2
  4. 4.0.28 × 2.9 — where does the decimal point go? (a) 0.00812 (b) 0.0812 (c) 0.812 (d) 8.12
  5. 5.0.55 × 31 — where does the decimal point go? (a) 17.05 (b) 1.705 (c) 170.5 (d) 0.1705
  6. 6.0.44 × 0.8 — where does the decimal point go? (a) 0.0352 (b) 3.52 (c) 0.352 (d) 0.00352
  7. 7.0.36 × 6 — where does the decimal point go? (a) 0.0216 (b) 0.216 (c) 21.6 (d) 2.16
  8. 8.3.6 × 23 — where does the decimal point go? (a) 8.28 (b) 82.8 (c) 0.828 (d) 828
  9. 9.4.8 × 24 — where does the decimal point go? (a) 1.152 (b) 115.2 (c) 1152 (d) 11.52
  10. 10.1.9 × 3.3 — where does the decimal point go? (a) 6.27 (b) 62.7 (c) 0.0627 (d) 0.627
  11. 11.0.14 × 6 — where does the decimal point go? (a) 0.084 (b) 0.0084 (c) 0.84 (d) 8.4
  12. 12.0.59 × 6 — where does the decimal point go? (a) 0.354 (b) 35.4 (c) 3.54 (d) 0.0354
  13. 13.3.6 × 2 — where does the decimal point go? (a) 7.2 (b) 0.072 (c) 0.72 (d) 72
  14. 14.1.2 × 3.7 — where does the decimal point go? (a) 0.0444 (b) 0.444 (c) 44.4 (d) 4.44
  15. 15.0.26 × 0.8 — where does the decimal point go? (a) 0.0208 (b) 0.208 (c) 0.00208 (d) 2.08
  16. 16.4.4 × 7 — where does the decimal point go? (a) 308 (b) 3.08 (c) 30.8 (d) 0.308
  17. 17.3.6 × 11 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 396 (d) 0.396
  18. 18.0.74 × 2.6 — where does the decimal point go? (a) 0.1924 (b) 1.924 (c) 19.24 (d) 0.01924
  19. 19.2.6 × 4 — where does the decimal point go? (a) 1.04 (b) 10.4 (c) 0.104 (d) 104
  20. 20.6.4 × 0.4 — where does the decimal point go? (a) 25.6 (b) 0.0256 (c) 2.56 (d) 0.256
  21. 21.0.42 × 26 — where does the decimal point go? (a) 0.1092 (b) 1.092 (c) 109.2 (d) 10.92
  22. 22.3.3 × 0.6 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 0.0198 (d) 19.8
  23. 23.4.2 × 2.8 — where does the decimal point go? (a) 117.6 (b) 1.176 (c) 11.76 (d) 0.1176
  24. 24.0.67 × 15 — where does the decimal point go? (a) 100.5 (b) 0.1005 (c) 10.05 (d) 1.005
  25. 25.7.3 × 0.9 — where does the decimal point go? (a) 0.0657 (b) 0.657 (c) 65.7 (d) 6.57
  26. 26.0.78 × 0.6 — where does the decimal point go? (a) 4.68 (b) 0.00468 (c) 0.0468 (d) 0.468
  27. 27.0.57 × 2 — where does the decimal point go? (a) 0.0114 (b) 11.4 (c) 0.114 (d) 1.14
  28. 28.9.6 × 0.4 — where does the decimal point go? (a) 0.0384 (b) 0.384 (c) 38.4 (d) 3.84
  29. 29.2.9 × 16 — where does the decimal point go? (a) 464 (b) 0.464 (c) 4.64 (d) 46.4
  30. 30.9.9 × 8 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 7.92 (d) 792
  31. 31.0.82 × 8 — where does the decimal point go? (a) 65.6 (b) 0.656 (c) 6.56 (d) 0.0656
  32. 32.9.7 × 8 — where does the decimal point go? (a) 0.776 (b) 7.76 (c) 776 (d) 77.6
  33. 33.5.6 × 1.9 — where does the decimal point go? (a) 1.064 (b) 10.64 (c) 106.4 (d) 0.1064
  34. 34.0.41 × 8 — where does the decimal point go? (a) 3.28 (b) 0.328 (c) 32.8 (d) 0.0328
  35. 35.1.9 × 17 — where does the decimal point go? (a) 32.3 (b) 3.23 (c) 323 (d) 0.323
  36. 36.0.31 × 0.3 — where does the decimal point go? (a) 0.093 (b) 0.93 (c) 0.0093 (d) 0.00093
  37. 37.5.1 × 31 — where does the decimal point go? (a) 1581 (b) 1.581 (c) 158.1 (d) 15.81
  38. 38.1.3 × 0.9 — where does the decimal point go? (a) 1.17 (b) 11.7 (c) 0.0117 (d) 0.117
  39. 39.3.2 × 9 — where does the decimal point go? (a) 288 (b) 28.8 (c) 2.88 (d) 0.288
  40. 40.0.82 × 41 — where does the decimal point go? (a) 0.3362 (b) 3.362 (c) 336.2 (d) 33.62

Answer key

  1. 5.64
  2. 0.416
  3. 11.2
  4. 0.812
  5. 17.05
  6. 0.352
  7. 2.16
  8. 82.8
  9. 115.2
  10. 6.27
  11. 0.84
  12. 3.54
  13. 7.2
  14. 4.44
  15. 0.208
  16. 30.8
  17. 39.6
  18. 1.924
  19. 10.4
  20. 2.56
  21. 10.92
  22. 1.98
  23. 11.76
  24. 10.05
  25. 6.57
  26. 0.468
  27. 1.14
  28. 3.84
  29. 46.4
  30. 79.2
  31. 6.56
  32. 77.6
  33. 10.64
  34. 3.28
  35. 32.3
  36. 0.093
  37. 158.1
  38. 1.17
  39. 28.8
  40. 33.62

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