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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 283 · 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. 1.0.77 × 0.3 — where does the decimal point go? (a) 2.31 (b) 0.00231 (c) 0.231 (d) 0.0231
  2. 2.0.26 × 0.6 — where does the decimal point go? (a) 0.00156 (b) 1.56 (c) 0.0156 (d) 0.156
  3. 3.3.9 × 32 — where does the decimal point go? (a) 1248 (b) 124.8 (c) 12.48 (d) 1.248
  4. 4.0.44 × 4 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.0176 (d) 0.176
  5. 5.2.5 × 9 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 225 (d) 22.5
  6. 6.1.2 × 39 — where does the decimal point go? (a) 0.468 (b) 468 (c) 46.8 (d) 4.68
  7. 7.8.1 × 13 — where does the decimal point go? (a) 1.053 (b) 1053 (c) 10.53 (d) 105.3
  8. 8.8.6 × 13 — where does the decimal point go? (a) 1.118 (b) 11.18 (c) 1118 (d) 111.8
  9. 9.6.2 × 4 — where does the decimal point go? (a) 0.248 (b) 2.48 (c) 24.8 (d) 248
  10. 10.0.29 × 3 — where does the decimal point go? (a) 0.0087 (b) 0.087 (c) 0.87 (d) 8.7
  11. 11.1.4 × 8 — where does the decimal point go? (a) 1.12 (b) 112 (c) 0.112 (d) 11.2
  12. 12.9.2 × 2 — where does the decimal point go? (a) 18.4 (b) 1.84 (c) 0.184 (d) 184
  13. 13.0.79 × 9 — where does the decimal point go? (a) 0.0711 (b) 0.711 (c) 71.1 (d) 7.11
  14. 14.4.4 × 36 — where does the decimal point go? (a) 15.84 (b) 1584 (c) 158.4 (d) 1.584
  15. 15.2.7 × 43 — where does the decimal point go? (a) 1.161 (b) 116.1 (c) 1161 (d) 11.61
  16. 16.2.9 × 3 — where does the decimal point go? (a) 0.087 (b) 8.7 (c) 0.87 (d) 87
  17. 17.0.28 × 4.2 — where does the decimal point go? (a) 11.76 (b) 0.01176 (c) 1.176 (d) 0.1176
  18. 18.0.78 × 17 — where does the decimal point go? (a) 13.26 (b) 0.1326 (c) 132.6 (d) 1.326
  19. 19.0.18 × 0.8 — where does the decimal point go? (a) 0.0144 (b) 1.44 (c) 0.144 (d) 0.00144
  20. 20.4.3 × 3.4 — where does the decimal point go? (a) 1.462 (b) 146.2 (c) 0.1462 (d) 14.62
  21. 21.0.43 × 2 — where does the decimal point go? (a) 8.6 (b) 0.086 (c) 0.0086 (d) 0.86
  22. 22.2.7 × 14 — where does the decimal point go? (a) 378 (b) 37.8 (c) 0.378 (d) 3.78
  23. 23.2.3 × 9 — where does the decimal point go? (a) 20.7 (b) 2.07 (c) 0.207 (d) 207
  24. 24.2.7 × 1.6 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.0432 (d) 0.432
  25. 25.8.2 × 0.8 — where does the decimal point go? (a) 0.656 (b) 0.0656 (c) 6.56 (d) 65.6
  26. 26.3.6 × 39 — where does the decimal point go? (a) 140.4 (b) 1.404 (c) 1404 (d) 14.04
  27. 27.4.8 × 1.7 — where does the decimal point go? (a) 81.6 (b) 8.16 (c) 0.816 (d) 0.0816
  28. 28.5.1 × 32 — where does the decimal point go? (a) 1632 (b) 16.32 (c) 163.2 (d) 1.632
  29. 29.0.96 × 0.2 — where does the decimal point go? (a) 1.92 (b) 0.00192 (c) 0.192 (d) 0.0192
  30. 30.4.6 × 2 — where does the decimal point go? (a) 9.2 (b) 92 (c) 0.92 (d) 0.092
  31. 31.4.2 × 31 — where does the decimal point go? (a) 130.2 (b) 13.02 (c) 1.302 (d) 1302
  32. 32.0.93 × 47 — where does the decimal point go? (a) 0.4371 (b) 4.371 (c) 437.1 (d) 43.71
  33. 33.0.88 × 3 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 26.4 (d) 2.64
  34. 34.9.4 × 0.3 — where does the decimal point go? (a) 0.282 (b) 2.82 (c) 28.2 (d) 0.0282
  35. 35.0.89 × 8 — where does the decimal point go? (a) 0.0712 (b) 71.2 (c) 7.12 (d) 0.712
  36. 36.0.75 × 41 — where does the decimal point go? (a) 307.5 (b) 3.075 (c) 0.3075 (d) 30.75
  37. 37.4.9 × 2 — where does the decimal point go? (a) 0.098 (b) 9.8 (c) 98 (d) 0.98
  38. 38.7.9 × 2 — where does the decimal point go? (a) 0.158 (b) 158 (c) 15.8 (d) 1.58
  39. 39.7.2 × 0.8 — where does the decimal point go? (a) 5.76 (b) 0.576 (c) 57.6 (d) 0.0576
  40. 40.9.7 × 4.8 — where does the decimal point go? (a) 465.6 (b) 0.4656 (c) 4.656 (d) 46.56

Answer key

  1. 0.231
  2. 0.156
  3. 124.8
  4. 1.76
  5. 22.5
  6. 46.8
  7. 105.3
  8. 111.8
  9. 24.8
  10. 0.87
  11. 11.2
  12. 18.4
  13. 7.11
  14. 158.4
  15. 116.1
  16. 8.7
  17. 1.176
  18. 13.26
  19. 0.144
  20. 14.62
  21. 0.86
  22. 37.8
  23. 20.7
  24. 4.32
  25. 6.56
  26. 140.4
  27. 8.16
  28. 163.2
  29. 0.192
  30. 9.2
  31. 130.2
  32. 43.71
  33. 2.64
  34. 2.82
  35. 7.12
  36. 30.75
  37. 9.8
  38. 15.8
  39. 5.76
  40. 46.56

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