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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 395 · 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. 1.0.14 × 0.4 — where does the decimal point go? (a) 0.056 (b) 0.56 (c) 0.00056 (d) 0.0056
  2. 2.5.7 × 4 — where does the decimal point go? (a) 2.28 (b) 22.8 (c) 228 (d) 0.228
  3. 3.1.8 × 3 — where does the decimal point go? (a) 0.54 (b) 5.4 (c) 0.054 (d) 54
  4. 4.0.66 × 4.9 — where does the decimal point go? (a) 0.3234 (b) 32.34 (c) 0.03234 (d) 3.234
  5. 5.4.3 × 0.4 — where does the decimal point go? (a) 0.172 (b) 17.2 (c) 0.0172 (d) 1.72
  6. 6.9.8 × 4 — where does the decimal point go? (a) 0.392 (b) 39.2 (c) 3.92 (d) 392
  7. 7.9.4 × 4 — where does the decimal point go? (a) 376 (b) 37.6 (c) 0.376 (d) 3.76
  8. 8.0.77 × 7 — where does the decimal point go? (a) 0.539 (b) 53.9 (c) 5.39 (d) 0.0539
  9. 9.0.39 × 2 — where does the decimal point go? (a) 0.0078 (b) 7.8 (c) 0.078 (d) 0.78
  10. 10.0.89 × 0.3 — where does the decimal point go? (a) 2.67 (b) 0.00267 (c) 0.0267 (d) 0.267
  11. 11.3.5 × 3.9 — where does the decimal point go? (a) 1.365 (b) 136.5 (c) 0.1365 (d) 13.65
  12. 12.9.8 × 9 — where does the decimal point go? (a) 88.2 (b) 882 (c) 8.82 (d) 0.882
  13. 13.0.22 × 9 — where does the decimal point go? (a) 0.198 (b) 1.98 (c) 0.0198 (d) 19.8
  14. 14.7.3 × 4 — where does the decimal point go? (a) 29.2 (b) 0.292 (c) 292 (d) 2.92
  15. 15.0.51 × 27 — where does the decimal point go? (a) 13.77 (b) 137.7 (c) 1.377 (d) 0.1377
  16. 16.8.1 × 6 — where does the decimal point go? (a) 486 (b) 48.6 (c) 0.486 (d) 4.86
  17. 17.0.34 × 0.2 — where does the decimal point go? (a) 0.0068 (b) 0.00068 (c) 0.68 (d) 0.068
  18. 18.0.78 × 6 — where does the decimal point go? (a) 0.468 (b) 46.8 (c) 0.0468 (d) 4.68
  19. 19.2.3 × 0.7 — where does the decimal point go? (a) 16.1 (b) 0.161 (c) 1.61 (d) 0.0161
  20. 20.0.35 × 45 — where does the decimal point go? (a) 1.575 (b) 157.5 (c) 15.75 (d) 0.1575
  21. 21.0.43 × 8 — where does the decimal point go? (a) 3.44 (b) 0.0344 (c) 0.344 (d) 34.4
  22. 22.0.99 × 7 — where does the decimal point go? (a) 6.93 (b) 0.693 (c) 69.3 (d) 0.0693
  23. 23.6.9 × 8 — where does the decimal point go? (a) 0.552 (b) 5.52 (c) 552 (d) 55.2
  24. 24.0.33 × 2 — where does the decimal point go? (a) 0.0066 (b) 0.066 (c) 0.66 (d) 6.6
  25. 25.7.8 × 0.6 — where does the decimal point go? (a) 0.0468 (b) 46.8 (c) 4.68 (d) 0.468
  26. 26.5.1 × 7 — where does the decimal point go? (a) 3.57 (b) 357 (c) 35.7 (d) 0.357
  27. 27.0.74 × 9 — where does the decimal point go? (a) 6.66 (b) 0.0666 (c) 66.6 (d) 0.666
  28. 28.0.85 × 0.7 — where does the decimal point go? (a) 0.595 (b) 0.00595 (c) 0.0595 (d) 5.95
  29. 29.0.89 × 6 — where does the decimal point go? (a) 0.0534 (b) 5.34 (c) 53.4 (d) 0.534
  30. 30.0.56 × 43 — where does the decimal point go? (a) 240.8 (b) 2.408 (c) 24.08 (d) 0.2408
  31. 31.9.7 × 4.1 — where does the decimal point go? (a) 3.977 (b) 0.3977 (c) 39.77 (d) 397.7
  32. 32.7.1 × 2 — where does the decimal point go? (a) 142 (b) 1.42 (c) 0.142 (d) 14.2
  33. 33.4.8 × 3 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 144 (d) 14.4
  34. 34.0.59 × 5 — where does the decimal point go? (a) 2.95 (b) 29.5 (c) 0.0295 (d) 0.295
  35. 35.2.7 × 4.6 — where does the decimal point go? (a) 1.242 (b) 12.42 (c) 0.1242 (d) 124.2
  36. 36.0.77 × 1.7 — where does the decimal point go? (a) 1.309 (b) 13.09 (c) 0.01309 (d) 0.1309
  37. 37.5.9 × 16 — where does the decimal point go? (a) 9.44 (b) 0.944 (c) 94.4 (d) 944
  38. 38.0.64 × 9 — where does the decimal point go? (a) 0.576 (b) 57.6 (c) 0.0576 (d) 5.76
  39. 39.0.17 × 0.7 — where does the decimal point go? (a) 1.19 (b) 0.0119 (c) 0.00119 (d) 0.119
  40. 40.0.15 × 0.3 — where does the decimal point go? (a) 0.00045 (b) 0.0045 (c) 0.45 (d) 0.045

Answer key

  1. 0.056
  2. 22.8
  3. 5.4
  4. 3.234
  5. 1.72
  6. 39.2
  7. 37.6
  8. 5.39
  9. 0.78
  10. 0.267
  11. 13.65
  12. 88.2
  13. 1.98
  14. 29.2
  15. 13.77
  16. 48.6
  17. 0.068
  18. 4.68
  19. 1.61
  20. 15.75
  21. 3.44
  22. 6.93
  23. 55.2
  24. 0.66
  25. 4.68
  26. 35.7
  27. 6.66
  28. 0.595
  29. 5.34
  30. 24.08
  31. 39.77
  32. 14.2
  33. 14.4
  34. 2.95
  35. 12.42
  36. 1.309
  37. 94.4
  38. 5.76
  39. 0.119
  40. 0.045

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