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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 981 · 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. 1.1.4 × 1.2 — where does the decimal point go? (a) 0.0168 (b) 0.168 (c) 16.8 (d) 1.68
  2. 2.0.39 × 5 — where does the decimal point go? (a) 0.0195 (b) 19.5 (c) 0.195 (d) 1.95
  3. 3.0.79 × 0.5 — where does the decimal point go? (a) 0.395 (b) 0.0395 (c) 3.95 (d) 0.00395
  4. 4.0.63 × 4 — where does the decimal point go? (a) 25.2 (b) 2.52 (c) 0.0252 (d) 0.252
  5. 5.0.28 × 2 — where does the decimal point go? (a) 5.6 (b) 0.056 (c) 0.0056 (d) 0.56
  6. 6.0.13 × 46 — where does the decimal point go? (a) 59.8 (b) 0.0598 (c) 0.598 (d) 5.98
  7. 7.5.5 × 0.7 — where does the decimal point go? (a) 38.5 (b) 0.0385 (c) 3.85 (d) 0.385
  8. 8.0.98 × 16 — where does the decimal point go? (a) 15.68 (b) 0.1568 (c) 1.568 (d) 156.8
  9. 9.0.65 × 3 — where does the decimal point go? (a) 0.195 (b) 1.95 (c) 0.0195 (d) 19.5
  10. 10.1.6 × 16 — where does the decimal point go? (a) 256 (b) 2.56 (c) 25.6 (d) 0.256
  11. 11.7.1 × 0.2 — where does the decimal point go? (a) 14.2 (b) 1.42 (c) 0.0142 (d) 0.142
  12. 12.0.26 × 0.4 — where does the decimal point go? (a) 0.104 (b) 0.0104 (c) 1.04 (d) 0.00104
  13. 13.6.8 × 0.3 — where does the decimal point go? (a) 0.0204 (b) 20.4 (c) 2.04 (d) 0.204
  14. 14.6.4 × 3 — where does the decimal point go? (a) 19.2 (b) 192 (c) 1.92 (d) 0.192
  15. 15.3.2 × 3.8 — where does the decimal point go? (a) 0.1216 (b) 12.16 (c) 1.216 (d) 121.6
  16. 16.0.31 × 22 — where does the decimal point go? (a) 0.0682 (b) 6.82 (c) 68.2 (d) 0.682
  17. 17.8.1 × 5 — where does the decimal point go? (a) 40.5 (b) 4.05 (c) 405 (d) 0.405
  18. 18.1.2 × 36 — where does the decimal point go? (a) 43.2 (b) 432 (c) 4.32 (d) 0.432
  19. 19.0.15 × 3.3 — where does the decimal point go? (a) 0.00495 (b) 0.495 (c) 4.95 (d) 0.0495
  20. 20.6.3 × 21 — where does the decimal point go? (a) 1.323 (b) 1323 (c) 132.3 (d) 13.23
  21. 21.0.12 × 4 — where does the decimal point go? (a) 0.0048 (b) 0.048 (c) 0.48 (d) 4.8
  22. 22.0.59 × 2.5 — where does the decimal point go? (a) 0.1475 (b) 0.01475 (c) 14.75 (d) 1.475
  23. 23.9.2 × 0.7 — where does the decimal point go? (a) 0.644 (b) 0.0644 (c) 6.44 (d) 64.4
  24. 24.0.41 × 3 — where does the decimal point go? (a) 1.23 (b) 0.123 (c) 0.0123 (d) 12.3
  25. 25.2.8 × 1.6 — where does the decimal point go? (a) 0.448 (b) 0.0448 (c) 4.48 (d) 44.8
  26. 26.5.1 × 7 — where does the decimal point go? (a) 3.57 (b) 0.357 (c) 357 (d) 35.7
  27. 27.1.7 × 1.1 — where does the decimal point go? (a) 18.7 (b) 0.0187 (c) 0.187 (d) 1.87
  28. 28.2.7 × 0.2 — where does the decimal point go? (a) 5.4 (b) 0.0054 (c) 0.054 (d) 0.54
  29. 29.0.32 × 2.3 — where does the decimal point go? (a) 0.736 (b) 7.36 (c) 0.00736 (d) 0.0736
  30. 30.6.2 × 4.8 — where does the decimal point go? (a) 29.76 (b) 0.2976 (c) 297.6 (d) 2.976
  31. 31.1.3 × 9 — where does the decimal point go? (a) 1.17 (b) 117 (c) 0.117 (d) 11.7
  32. 32.0.76 × 2 — where does the decimal point go? (a) 0.152 (b) 15.2 (c) 1.52 (d) 0.0152
  33. 33.7.8 × 24 — where does the decimal point go? (a) 1.872 (b) 1872 (c) 18.72 (d) 187.2
  34. 34.0.21 × 0.2 — where does the decimal point go? (a) 0.042 (b) 0.42 (c) 0.00042 (d) 0.0042
  35. 35.2.3 × 1.6 — where does the decimal point go? (a) 3.68 (b) 0.0368 (c) 0.368 (d) 36.8
  36. 36.7.3 × 22 — where does the decimal point go? (a) 160.6 (b) 1.606 (c) 1606 (d) 16.06
  37. 37.7.5 × 0.9 — where does the decimal point go? (a) 0.0675 (b) 67.5 (c) 6.75 (d) 0.675
  38. 38.0.67 × 4.1 — where does the decimal point go? (a) 2.747 (b) 0.02747 (c) 0.2747 (d) 27.47
  39. 39.4.1 × 0.6 — where does the decimal point go? (a) 0.0246 (b) 2.46 (c) 0.246 (d) 24.6
  40. 40.5.4 × 2 — where does the decimal point go? (a) 1.08 (b) 108 (c) 0.108 (d) 10.8

Answer key

  1. 1.68
  2. 1.95
  3. 0.395
  4. 2.52
  5. 0.56
  6. 5.98
  7. 3.85
  8. 15.68
  9. 1.95
  10. 25.6
  11. 1.42
  12. 0.104
  13. 2.04
  14. 19.2
  15. 12.16
  16. 6.82
  17. 40.5
  18. 43.2
  19. 0.495
  20. 132.3
  21. 0.48
  22. 1.475
  23. 6.44
  24. 1.23
  25. 4.48
  26. 35.7
  27. 1.87
  28. 0.54
  29. 0.736
  30. 29.76
  31. 11.7
  32. 1.52
  33. 187.2
  34. 0.042
  35. 3.68
  36. 160.6
  37. 6.75
  38. 2.747
  39. 2.46
  40. 10.8

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