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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 878 · 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. 1.9.9 × 2.8 — where does the decimal point go? (a) 277.2 (b) 0.2772 (c) 2.772 (d) 27.72
  2. 2.8.3 × 8 — where does the decimal point go? (a) 66.4 (b) 664 (c) 6.64 (d) 0.664
  3. 3.0.19 × 0.5 — where does the decimal point go? (a) 0.95 (b) 0.095 (c) 0.0095 (d) 0.00095
  4. 4.5.4 × 2 — where does the decimal point go? (a) 10.8 (b) 108 (c) 1.08 (d) 0.108
  5. 5.4.2 × 6 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 252
  6. 6.4.9 × 0.2 — where does the decimal point go? (a) 0.0098 (b) 0.98 (c) 9.8 (d) 0.098
  7. 7.6.1 × 47 — where does the decimal point go? (a) 28.67 (b) 2867 (c) 2.867 (d) 286.7
  8. 8.0.83 × 2 — where does the decimal point go? (a) 0.0166 (b) 0.166 (c) 1.66 (d) 16.6
  9. 9.1.6 × 12 — where does the decimal point go? (a) 19.2 (b) 0.192 (c) 1.92 (d) 192
  10. 10.0.41 × 2 — where does the decimal point go? (a) 0.082 (b) 8.2 (c) 0.0082 (d) 0.82
  11. 11.3.6 × 0.7 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 25.2 (d) 2.52
  12. 12.0.29 × 5 — where does the decimal point go? (a) 14.5 (b) 1.45 (c) 0.145 (d) 0.0145
  13. 13.0.43 × 28 — where does the decimal point go? (a) 120.4 (b) 1.204 (c) 0.1204 (d) 12.04
  14. 14.0.63 × 0.2 — where does the decimal point go? (a) 0.126 (b) 0.0126 (c) 1.26 (d) 0.00126
  15. 15.9.6 × 37 — where does the decimal point go? (a) 3.552 (b) 355.2 (c) 35.52 (d) 3552
  16. 16.9.1 × 43 — where does the decimal point go? (a) 3.913 (b) 39.13 (c) 3913 (d) 391.3
  17. 17.9.8 × 9 — where does the decimal point go? (a) 88.2 (b) 8.82 (c) 882 (d) 0.882
  18. 18.7.3 × 1.4 — where does the decimal point go? (a) 102.2 (b) 1.022 (c) 0.1022 (d) 10.22
  19. 19.5.1 × 49 — where does the decimal point go? (a) 2.499 (b) 2499 (c) 24.99 (d) 249.9
  20. 20.0.78 × 21 — where does the decimal point go? (a) 16.38 (b) 0.1638 (c) 1.638 (d) 163.8
  21. 21.0.74 × 4.6 — where does the decimal point go? (a) 34.04 (b) 0.3404 (c) 3.404 (d) 0.03404
  22. 22.0.77 × 2 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 0.0154 (d) 15.4
  23. 23.0.17 × 3 — where does the decimal point go? (a) 0.051 (b) 0.51 (c) 5.1 (d) 0.0051
  24. 24.0.96 × 3 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  25. 25.3.8 × 29 — where does the decimal point go? (a) 110.2 (b) 1.102 (c) 11.02 (d) 1102
  26. 26.3.1 × 0.2 — where does the decimal point go? (a) 6.2 (b) 0.62 (c) 0.062 (d) 0.0062
  27. 27.2.4 × 0.3 — where does the decimal point go? (a) 0.0072 (b) 0.72 (c) 0.072 (d) 7.2
  28. 28.8.8 × 0.4 — where does the decimal point go? (a) 0.352 (b) 35.2 (c) 3.52 (d) 0.0352
  29. 29.0.67 × 3.4 — where does the decimal point go? (a) 2.278 (b) 0.02278 (c) 0.2278 (d) 22.78
  30. 30.0.17 × 2.5 — where does the decimal point go? (a) 0.425 (b) 0.0425 (c) 0.00425 (d) 4.25
  31. 31.2.1 × 0.4 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 0.0084 (d) 8.4
  32. 32.0.97 × 5 — where does the decimal point go? (a) 48.5 (b) 0.0485 (c) 0.485 (d) 4.85
  33. 33.7.7 × 3 — where does the decimal point go? (a) 2.31 (b) 0.231 (c) 231 (d) 23.1
  34. 34.4.6 × 6 — where does the decimal point go? (a) 0.276 (b) 27.6 (c) 276 (d) 2.76
  35. 35.4.7 × 8 — where does the decimal point go? (a) 0.376 (b) 3.76 (c) 376 (d) 37.6
  36. 36.0.16 × 4 — where does the decimal point go? (a) 0.64 (b) 0.064 (c) 0.0064 (d) 6.4
  37. 37.7.1 × 0.5 — where does the decimal point go? (a) 35.5 (b) 3.55 (c) 0.355 (d) 0.0355
  38. 38.3.4 × 28 — where does the decimal point go? (a) 0.952 (b) 952 (c) 9.52 (d) 95.2
  39. 39.0.33 × 0.3 — where does the decimal point go? (a) 0.99 (b) 0.0099 (c) 0.00099 (d) 0.099
  40. 40.7.6 × 19 — where does the decimal point go? (a) 14.44 (b) 1.444 (c) 144.4 (d) 1444

Answer key

  1. 27.72
  2. 66.4
  3. 0.095
  4. 10.8
  5. 25.2
  6. 0.98
  7. 286.7
  8. 1.66
  9. 19.2
  10. 0.82
  11. 2.52
  12. 1.45
  13. 12.04
  14. 0.126
  15. 355.2
  16. 391.3
  17. 88.2
  18. 10.22
  19. 249.9
  20. 16.38
  21. 3.404
  22. 1.54
  23. 0.51
  24. 2.88
  25. 110.2
  26. 0.62
  27. 0.72
  28. 3.52
  29. 2.278
  30. 0.425
  31. 0.84
  32. 4.85
  33. 23.1
  34. 27.6
  35. 37.6
  36. 0.64
  37. 3.55
  38. 95.2
  39. 0.099
  40. 144.4

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