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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 312 · 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. 1.0.47 × 0.8 — where does the decimal point go? (a) 0.376 (b) 0.0376 (c) 3.76 (d) 0.00376
  2. 2.0.67 × 48 — where does the decimal point go? (a) 3.216 (b) 32.16 (c) 0.3216 (d) 321.6
  3. 3.0.99 × 4.3 — where does the decimal point go? (a) 42.57 (b) 0.04257 (c) 0.4257 (d) 4.257
  4. 4.0.75 × 0.5 — where does the decimal point go? (a) 0.0375 (b) 0.375 (c) 3.75 (d) 0.00375
  5. 5.5.9 × 7 — where does the decimal point go? (a) 4.13 (b) 41.3 (c) 0.413 (d) 413
  6. 6.0.59 × 26 — where does the decimal point go? (a) 1.534 (b) 0.1534 (c) 153.4 (d) 15.34
  7. 7.1.3 × 49 — where does the decimal point go? (a) 6.37 (b) 637 (c) 63.7 (d) 0.637
  8. 8.7.8 × 1.9 — where does the decimal point go? (a) 148.2 (b) 14.82 (c) 1.482 (d) 0.1482
  9. 9.2.5 × 33 — where does the decimal point go? (a) 825 (b) 8.25 (c) 0.825 (d) 82.5
  10. 10.0.44 × 3 — where does the decimal point go? (a) 0.0132 (b) 0.132 (c) 13.2 (d) 1.32
  11. 11.9.9 × 1.9 — where does the decimal point go? (a) 18.81 (b) 188.1 (c) 1.881 (d) 0.1881
  12. 12.0.72 × 0.8 — where does the decimal point go? (a) 0.576 (b) 5.76 (c) 0.0576 (d) 0.00576
  13. 13.0.21 × 9 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 18.9 (d) 0.0189
  14. 14.0.92 × 2 — where does the decimal point go? (a) 0.184 (b) 18.4 (c) 1.84 (d) 0.0184
  15. 15.7.3 × 5 — where does the decimal point go? (a) 365 (b) 0.365 (c) 36.5 (d) 3.65
  16. 16.0.71 × 3 — where does the decimal point go? (a) 2.13 (b) 21.3 (c) 0.0213 (d) 0.213
  17. 17.9.6 × 0.3 — where does the decimal point go? (a) 28.8 (b) 0.288 (c) 0.0288 (d) 2.88
  18. 18.0.24 × 48 — where does the decimal point go? (a) 11.52 (b) 0.1152 (c) 1.152 (d) 115.2
  19. 19.6.9 × 5 — where does the decimal point go? (a) 3.45 (b) 345 (c) 34.5 (d) 0.345
  20. 20.1.7 × 0.7 — where does the decimal point go? (a) 0.0119 (b) 0.119 (c) 11.9 (d) 1.19
  21. 21.0.37 × 3.6 — where does the decimal point go? (a) 0.01332 (b) 1.332 (c) 0.1332 (d) 13.32
  22. 22.8.7 × 0.2 — where does the decimal point go? (a) 0.0174 (b) 17.4 (c) 1.74 (d) 0.174
  23. 23.1.3 × 37 — where does the decimal point go? (a) 481 (b) 4.81 (c) 0.481 (d) 48.1
  24. 24.2.7 × 0.7 — where does the decimal point go? (a) 18.9 (b) 0.0189 (c) 0.189 (d) 1.89
  25. 25.1.3 × 4.3 — where does the decimal point go? (a) 5.59 (b) 55.9 (c) 0.0559 (d) 0.559
  26. 26.0.43 × 3 — where does the decimal point go? (a) 1.29 (b) 0.0129 (c) 0.129 (d) 12.9
  27. 27.0.71 × 1.5 — where does the decimal point go? (a) 0.01065 (b) 1.065 (c) 10.65 (d) 0.1065
  28. 28.7.7 × 3 — where does the decimal point go? (a) 0.231 (b) 231 (c) 23.1 (d) 2.31
  29. 29.1.3 × 15 — where does the decimal point go? (a) 0.195 (b) 195 (c) 19.5 (d) 1.95
  30. 30.0.52 × 0.3 — where does the decimal point go? (a) 0.00156 (b) 1.56 (c) 0.0156 (d) 0.156
  31. 31.6.9 × 0.3 — where does the decimal point go? (a) 0.0207 (b) 2.07 (c) 20.7 (d) 0.207
  32. 32.3.6 × 8 — where does the decimal point go? (a) 288 (b) 28.8 (c) 0.288 (d) 2.88
  33. 33.2.2 × 0.7 — where does the decimal point go? (a) 0.0154 (b) 15.4 (c) 1.54 (d) 0.154
  34. 34.0.63 × 0.4 — where does the decimal point go? (a) 0.00252 (b) 0.252 (c) 2.52 (d) 0.0252
  35. 35.2.2 × 1.4 — where does the decimal point go? (a) 0.308 (b) 0.0308 (c) 30.8 (d) 3.08
  36. 36.0.24 × 2.9 — where does the decimal point go? (a) 0.00696 (b) 0.696 (c) 6.96 (d) 0.0696
  37. 37.1.2 × 0.2 — where does the decimal point go? (a) 0.24 (b) 0.024 (c) 2.4 (d) 0.0024
  38. 38.4.1 × 4 — where does the decimal point go? (a) 164 (b) 1.64 (c) 16.4 (d) 0.164
  39. 39.7.5 × 0.9 — where does the decimal point go? (a) 0.0675 (b) 67.5 (c) 6.75 (d) 0.675
  40. 40.3.7 × 0.5 — where does the decimal point go? (a) 0.0185 (b) 1.85 (c) 0.185 (d) 18.5

Answer key

  1. 0.376
  2. 32.16
  3. 4.257
  4. 0.375
  5. 41.3
  6. 15.34
  7. 63.7
  8. 14.82
  9. 82.5
  10. 1.32
  11. 18.81
  12. 0.576
  13. 1.89
  14. 1.84
  15. 36.5
  16. 2.13
  17. 2.88
  18. 11.52
  19. 34.5
  20. 1.19
  21. 1.332
  22. 1.74
  23. 48.1
  24. 1.89
  25. 5.59
  26. 1.29
  27. 1.065
  28. 23.1
  29. 19.5
  30. 0.156
  31. 2.07
  32. 28.8
  33. 1.54
  34. 0.252
  35. 3.08
  36. 0.696
  37. 0.24
  38. 16.4
  39. 6.75
  40. 1.85

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