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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 985 · 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. 1.3.2 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 9.6 (d) 0.096
  2. 2.9.6 × 0.4 — where does the decimal point go? (a) 3.84 (b) 0.0384 (c) 0.384 (d) 38.4
  3. 3.0.89 × 3.5 — where does the decimal point go? (a) 0.03115 (b) 31.15 (c) 3.115 (d) 0.3115
  4. 4.6.4 × 3.4 — where does the decimal point go? (a) 2.176 (b) 217.6 (c) 21.76 (d) 0.2176
  5. 5.0.55 × 4.3 — where does the decimal point go? (a) 2.365 (b) 0.2365 (c) 0.02365 (d) 23.65
  6. 6.2.7 × 8 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 216
  7. 7.0.47 × 0.2 — where does the decimal point go? (a) 0.094 (b) 0.0094 (c) 0.94 (d) 0.00094
  8. 8.6.2 × 0.9 — where does the decimal point go? (a) 5.58 (b) 0.0558 (c) 0.558 (d) 55.8
  9. 9.4.5 × 3 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 0.135 (d) 135
  10. 10.0.64 × 9 — where does the decimal point go? (a) 5.76 (b) 0.576 (c) 0.0576 (d) 57.6
  11. 11.3.7 × 3.7 — where does the decimal point go? (a) 13.69 (b) 136.9 (c) 1.369 (d) 0.1369
  12. 12.0.28 × 3 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.0084 (d) 0.084
  13. 13.9.2 × 0.3 — where does the decimal point go? (a) 2.76 (b) 0.0276 (c) 0.276 (d) 27.6
  14. 14.0.47 × 4.5 — where does the decimal point go? (a) 0.02115 (b) 0.2115 (c) 2.115 (d) 21.15
  15. 15.6.6 × 3 — where does the decimal point go? (a) 198 (b) 1.98 (c) 19.8 (d) 0.198
  16. 16.2.3 × 13 — where does the decimal point go? (a) 29.9 (b) 299 (c) 2.99 (d) 0.299
  17. 17.7.8 × 9 — where does the decimal point go? (a) 7.02 (b) 702 (c) 70.2 (d) 0.702
  18. 18.0.18 × 0.7 — where does the decimal point go? (a) 0.126 (b) 0.00126 (c) 1.26 (d) 0.0126
  19. 19.4.2 × 3 — where does the decimal point go? (a) 0.126 (b) 1.26 (c) 126 (d) 12.6
  20. 20.2.8 × 19 — where does the decimal point go? (a) 53.2 (b) 0.532 (c) 5.32 (d) 532
  21. 21.0.28 × 13 — where does the decimal point go? (a) 3.64 (b) 0.0364 (c) 0.364 (d) 36.4
  22. 22.9.3 × 18 — where does the decimal point go? (a) 1674 (b) 16.74 (c) 167.4 (d) 1.674
  23. 23.0.16 × 0.7 — where does the decimal point go? (a) 0.00112 (b) 0.0112 (c) 0.112 (d) 1.12
  24. 24.0.14 × 38 — where does the decimal point go? (a) 5.32 (b) 53.2 (c) 0.0532 (d) 0.532
  25. 25.4.6 × 0.8 — where does the decimal point go? (a) 0.0368 (b) 36.8 (c) 3.68 (d) 0.368
  26. 26.2.8 × 0.9 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 2.52 (d) 25.2
  27. 27.9.5 × 0.7 — where does the decimal point go? (a) 6.65 (b) 0.665 (c) 0.0665 (d) 66.5
  28. 28.0.36 × 1.8 — where does the decimal point go? (a) 0.648 (b) 0.0648 (c) 6.48 (d) 0.00648
  29. 29.0.25 × 5 — where does the decimal point go? (a) 1.25 (b) 0.0125 (c) 0.125 (d) 12.5
  30. 30.6.8 × 9 — where does the decimal point go? (a) 61.2 (b) 6.12 (c) 612 (d) 0.612
  31. 31.0.64 × 2.6 — where does the decimal point go? (a) 0.1664 (b) 1.664 (c) 0.01664 (d) 16.64
  32. 32.0.98 × 0.9 — where does the decimal point go? (a) 8.82 (b) 0.00882 (c) 0.882 (d) 0.0882
  33. 33.0.59 × 11 — where does the decimal point go? (a) 0.0649 (b) 0.649 (c) 64.9 (d) 6.49
  34. 34.0.79 × 8 — where does the decimal point go? (a) 0.0632 (b) 0.632 (c) 6.32 (d) 63.2
  35. 35.0.91 × 1.9 — where does the decimal point go? (a) 0.01729 (b) 1.729 (c) 17.29 (d) 0.1729
  36. 36.5.8 × 0.4 — where does the decimal point go? (a) 2.32 (b) 23.2 (c) 0.0232 (d) 0.232
  37. 37.0.41 × 0.7 — where does the decimal point go? (a) 2.87 (b) 0.0287 (c) 0.287 (d) 0.00287
  38. 38.5.7 × 0.7 — where does the decimal point go? (a) 0.399 (b) 3.99 (c) 0.0399 (d) 39.9
  39. 39.0.91 × 47 — where does the decimal point go? (a) 0.4277 (b) 4.277 (c) 427.7 (d) 42.77
  40. 40.1.2 × 4 — where does the decimal point go? (a) 4.8 (b) 0.48 (c) 0.048 (d) 48

Answer key

  1. 0.96
  2. 3.84
  3. 3.115
  4. 21.76
  5. 2.365
  6. 21.6
  7. 0.094
  8. 5.58
  9. 13.5
  10. 5.76
  11. 13.69
  12. 0.84
  13. 2.76
  14. 2.115
  15. 19.8
  16. 29.9
  17. 70.2
  18. 0.126
  19. 12.6
  20. 53.2
  21. 3.64
  22. 167.4
  23. 0.112
  24. 5.32
  25. 3.68
  26. 2.52
  27. 6.65
  28. 0.648
  29. 1.25
  30. 61.2
  31. 1.664
  32. 0.882
  33. 6.49
  34. 6.32
  35. 1.729
  36. 2.32
  37. 0.287
  38. 3.99
  39. 42.77
  40. 4.8

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