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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 940 · 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. 1.4.8 × 3.1 — where does the decimal point go? (a) 14.88 (b) 1.488 (c) 0.1488 (d) 148.8
  2. 2.0.37 × 5 — where does the decimal point go? (a) 1.85 (b) 0.185 (c) 0.0185 (d) 18.5
  3. 3.0.61 × 2 — where does the decimal point go? (a) 0.0122 (b) 1.22 (c) 12.2 (d) 0.122
  4. 4.0.48 × 0.2 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.00096 (d) 0.96
  5. 5.1.6 × 0.6 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 9.6
  6. 6.8.8 × 4.3 — where does the decimal point go? (a) 3.784 (b) 37.84 (c) 0.3784 (d) 378.4
  7. 7.0.81 × 47 — where does the decimal point go? (a) 0.3807 (b) 3.807 (c) 380.7 (d) 38.07
  8. 8.0.64 × 18 — where does the decimal point go? (a) 115.2 (b) 11.52 (c) 1.152 (d) 0.1152
  9. 9.2.7 × 4 — where does the decimal point go? (a) 0.108 (b) 108 (c) 10.8 (d) 1.08
  10. 10.0.19 × 2 — where does the decimal point go? (a) 0.038 (b) 0.0038 (c) 0.38 (d) 3.8
  11. 11.0.45 × 0.9 — where does the decimal point go? (a) 0.405 (b) 0.00405 (c) 0.0405 (d) 4.05
  12. 12.4.9 × 2.4 — where does the decimal point go? (a) 11.76 (b) 1.176 (c) 117.6 (d) 0.1176
  13. 13.7.1 × 1.8 — where does the decimal point go? (a) 127.8 (b) 0.1278 (c) 12.78 (d) 1.278
  14. 14.5.3 × 4.3 — where does the decimal point go? (a) 2.279 (b) 227.9 (c) 0.2279 (d) 22.79
  15. 15.0.39 × 0.3 — where does the decimal point go? (a) 0.00117 (b) 0.117 (c) 1.17 (d) 0.0117
  16. 16.5.1 × 44 — where does the decimal point go? (a) 2244 (b) 224.4 (c) 22.44 (d) 2.244
  17. 17.0.91 × 0.5 — where does the decimal point go? (a) 0.00455 (b) 0.0455 (c) 4.55 (d) 0.455
  18. 18.0.39 × 1.5 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 0.00585 (d) 0.0585
  19. 19.3.2 × 0.3 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 0.0096 (d) 9.6
  20. 20.1.4 × 2.4 — where does the decimal point go? (a) 0.0336 (b) 3.36 (c) 0.336 (d) 33.6
  21. 21.6.4 × 8 — where does the decimal point go? (a) 0.512 (b) 5.12 (c) 512 (d) 51.2
  22. 22.3.4 × 2 — where does the decimal point go? (a) 0.068 (b) 6.8 (c) 68 (d) 0.68
  23. 23.7.3 × 0.4 — where does the decimal point go? (a) 2.92 (b) 0.0292 (c) 29.2 (d) 0.292
  24. 24.0.27 × 0.5 — where does the decimal point go? (a) 0.135 (b) 0.0135 (c) 1.35 (d) 0.00135
  25. 25.0.25 × 3.5 — where does the decimal point go? (a) 0.875 (b) 0.00875 (c) 8.75 (d) 0.0875
  26. 26.0.85 × 0.7 — where does the decimal point go? (a) 5.95 (b) 0.00595 (c) 0.0595 (d) 0.595
  27. 27.6.6 × 19 — where does the decimal point go? (a) 12.54 (b) 1254 (c) 125.4 (d) 1.254
  28. 28.0.63 × 13 — where does the decimal point go? (a) 8.19 (b) 0.0819 (c) 81.9 (d) 0.819
  29. 29.6.7 × 9 — where does the decimal point go? (a) 603 (b) 6.03 (c) 60.3 (d) 0.603
  30. 30.4.8 × 4.7 — where does the decimal point go? (a) 0.2256 (b) 22.56 (c) 225.6 (d) 2.256
  31. 31.0.43 × 3 — where does the decimal point go? (a) 0.129 (b) 1.29 (c) 0.0129 (d) 12.9
  32. 32.0.39 × 7 — where does the decimal point go? (a) 2.73 (b) 27.3 (c) 0.0273 (d) 0.273
  33. 33.5.1 × 36 — where does the decimal point go? (a) 183.6 (b) 1.836 (c) 1836 (d) 18.36
  34. 34.5.1 × 0.2 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 10.2 (d) 0.0102
  35. 35.0.44 × 4.7 — where does the decimal point go? (a) 0.02068 (b) 2.068 (c) 0.2068 (d) 20.68
  36. 36.9.6 × 3 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 28.8 (d) 288
  37. 37.5.9 × 2 — where does the decimal point go? (a) 0.118 (b) 11.8 (c) 118 (d) 1.18
  38. 38.8.2 × 2 — where does the decimal point go? (a) 164 (b) 1.64 (c) 0.164 (d) 16.4
  39. 39.9.4 × 6 — where does the decimal point go? (a) 56.4 (b) 5.64 (c) 0.564 (d) 564
  40. 40.4.3 × 2 — where does the decimal point go? (a) 8.6 (b) 0.86 (c) 0.086 (d) 86

Answer key

  1. 14.88
  2. 1.85
  3. 1.22
  4. 0.096
  5. 0.96
  6. 37.84
  7. 38.07
  8. 11.52
  9. 10.8
  10. 0.38
  11. 0.405
  12. 11.76
  13. 12.78
  14. 22.79
  15. 0.117
  16. 224.4
  17. 0.455
  18. 0.585
  19. 0.96
  20. 3.36
  21. 51.2
  22. 6.8
  23. 2.92
  24. 0.135
  25. 0.875
  26. 0.595
  27. 125.4
  28. 8.19
  29. 60.3
  30. 22.56
  31. 1.29
  32. 2.73
  33. 183.6
  34. 1.02
  35. 2.068
  36. 28.8
  37. 11.8
  38. 16.4
  39. 56.4
  40. 8.6

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