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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 657 · 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. 1.6.6 × 8 — where does the decimal point go? (a) 0.528 (b) 52.8 (c) 5.28 (d) 528
  2. 2.0.65 × 7 — where does the decimal point go? (a) 4.55 (b) 45.5 (c) 0.0455 (d) 0.455
  3. 3.5.1 × 14 — where does the decimal point go? (a) 71.4 (b) 0.714 (c) 714 (d) 7.14
  4. 4.7.7 × 0.3 — where does the decimal point go? (a) 0.0231 (b) 2.31 (c) 23.1 (d) 0.231
  5. 5.0.71 × 3.5 — where does the decimal point go? (a) 0.2485 (b) 0.02485 (c) 24.85 (d) 2.485
  6. 6.5.9 × 33 — where does the decimal point go? (a) 19.47 (b) 1.947 (c) 194.7 (d) 1947
  7. 7.0.76 × 0.2 — where does the decimal point go? (a) 0.152 (b) 0.00152 (c) 0.0152 (d) 1.52
  8. 8.0.65 × 0.5 — where does the decimal point go? (a) 3.25 (b) 0.0325 (c) 0.325 (d) 0.00325
  9. 9.7.1 × 0.7 — where does the decimal point go? (a) 0.0497 (b) 0.497 (c) 4.97 (d) 49.7
  10. 10.1.9 × 4 — where does the decimal point go? (a) 0.76 (b) 7.6 (c) 76 (d) 0.076
  11. 11.8.3 × 5 — where does the decimal point go? (a) 4.15 (b) 41.5 (c) 0.415 (d) 415
  12. 12.0.45 × 0.5 — where does the decimal point go? (a) 0.0225 (b) 0.00225 (c) 0.225 (d) 2.25
  13. 13.4.2 × 19 — where does the decimal point go? (a) 0.798 (b) 79.8 (c) 7.98 (d) 798
  14. 14.0.88 × 4.7 — where does the decimal point go? (a) 0.4136 (b) 4.136 (c) 41.36 (d) 0.04136
  15. 15.0.61 × 15 — where does the decimal point go? (a) 0.0915 (b) 91.5 (c) 0.915 (d) 9.15
  16. 16.0.79 × 0.3 — where does the decimal point go? (a) 2.37 (b) 0.00237 (c) 0.237 (d) 0.0237
  17. 17.0.41 × 8 — where does the decimal point go? (a) 32.8 (b) 0.328 (c) 0.0328 (d) 3.28
  18. 18.8.6 × 0.2 — where does the decimal point go? (a) 0.0172 (b) 17.2 (c) 1.72 (d) 0.172
  19. 19.9.3 × 38 — where does the decimal point go? (a) 353.4 (b) 3.534 (c) 3534 (d) 35.34
  20. 20.0.44 × 0.7 — where does the decimal point go? (a) 0.308 (b) 0.0308 (c) 0.00308 (d) 3.08
  21. 21.0.58 × 6 — where does the decimal point go? (a) 0.0348 (b) 0.348 (c) 34.8 (d) 3.48
  22. 22.8.5 × 3.5 — where does the decimal point go? (a) 297.5 (b) 0.2975 (c) 29.75 (d) 2.975
  23. 23.0.87 × 2.1 — where does the decimal point go? (a) 1.827 (b) 0.01827 (c) 0.1827 (d) 18.27
  24. 24.0.36 × 0.8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.00288 (d) 0.0288
  25. 25.0.42 × 0.8 — where does the decimal point go? (a) 0.336 (b) 0.00336 (c) 0.0336 (d) 3.36
  26. 26.0.54 × 3 — where does the decimal point go? (a) 16.2 (b) 0.162 (c) 0.0162 (d) 1.62
  27. 27.8.2 × 4.8 — where does the decimal point go? (a) 393.6 (b) 3.936 (c) 0.3936 (d) 39.36
  28. 28.0.26 × 0.8 — where does the decimal point go? (a) 0.00208 (b) 2.08 (c) 0.0208 (d) 0.208
  29. 29.0.78 × 0.2 — where does the decimal point go? (a) 1.56 (b) 0.00156 (c) 0.0156 (d) 0.156
  30. 30.2.8 × 3.2 — where does the decimal point go? (a) 8.96 (b) 89.6 (c) 0.896 (d) 0.0896
  31. 31.2.9 × 7 — where does the decimal point go? (a) 203 (b) 0.203 (c) 20.3 (d) 2.03
  32. 32.3.6 × 2.8 — where does the decimal point go? (a) 1.008 (b) 10.08 (c) 100.8 (d) 0.1008
  33. 33.7.5 × 5 — where does the decimal point go? (a) 37.5 (b) 3.75 (c) 375 (d) 0.375
  34. 34.9.7 × 0.4 — where does the decimal point go? (a) 0.0388 (b) 3.88 (c) 38.8 (d) 0.388
  35. 35.0.21 × 7 — where does the decimal point go? (a) 0.147 (b) 1.47 (c) 14.7 (d) 0.0147
  36. 36.0.31 × 9 — where does the decimal point go? (a) 0.0279 (b) 27.9 (c) 0.279 (d) 2.79
  37. 37.0.71 × 0.3 — where does the decimal point go? (a) 0.00213 (b) 0.0213 (c) 0.213 (d) 2.13
  38. 38.9.2 × 11 — where does the decimal point go? (a) 1012 (b) 1.012 (c) 10.12 (d) 101.2
  39. 39.0.92 × 23 — where does the decimal point go? (a) 21.16 (b) 0.2116 (c) 2.116 (d) 211.6
  40. 40.1.5 × 0.3 — where does the decimal point go? (a) 0.045 (b) 4.5 (c) 0.0045 (d) 0.45

Answer key

  1. 52.8
  2. 4.55
  3. 71.4
  4. 2.31
  5. 2.485
  6. 194.7
  7. 0.152
  8. 0.325
  9. 4.97
  10. 7.6
  11. 41.5
  12. 0.225
  13. 79.8
  14. 4.136
  15. 9.15
  16. 0.237
  17. 3.28
  18. 1.72
  19. 353.4
  20. 0.308
  21. 3.48
  22. 29.75
  23. 1.827
  24. 0.288
  25. 0.336
  26. 1.62
  27. 39.36
  28. 0.208
  29. 0.156
  30. 8.96
  31. 20.3
  32. 10.08
  33. 37.5
  34. 3.88
  35. 1.47
  36. 2.79
  37. 0.213
  38. 101.2
  39. 21.16
  40. 0.45

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