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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 590 · 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. 1.1.3 × 9 — where does the decimal point go? (a) 117 (b) 0.117 (c) 11.7 (d) 1.17
  2. 2.0.18 × 7 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.126 (d) 0.0126
  3. 3.0.31 × 0.5 — where does the decimal point go? (a) 0.00155 (b) 0.155 (c) 1.55 (d) 0.0155
  4. 4.1.9 × 0.4 — where does the decimal point go? (a) 0.0076 (b) 0.076 (c) 7.6 (d) 0.76
  5. 5.0.76 × 0.7 — where does the decimal point go? (a) 5.32 (b) 0.0532 (c) 0.00532 (d) 0.532
  6. 6.1.3 × 3.3 — where does the decimal point go? (a) 0.429 (b) 0.0429 (c) 4.29 (d) 42.9
  7. 7.9.8 × 39 — where does the decimal point go? (a) 382.2 (b) 38.22 (c) 3.822 (d) 3822
  8. 8.5.7 × 26 — where does the decimal point go? (a) 148.2 (b) 14.82 (c) 1482 (d) 1.482
  9. 9.6.3 × 0.7 — where does the decimal point go? (a) 0.441 (b) 4.41 (c) 44.1 (d) 0.0441
  10. 10.8.9 × 37 — where does the decimal point go? (a) 3.293 (b) 32.93 (c) 3293 (d) 329.3
  11. 11.5.3 × 3.1 — where does the decimal point go? (a) 16.43 (b) 0.1643 (c) 1.643 (d) 164.3
  12. 12.8.9 × 0.7 — where does the decimal point go? (a) 6.23 (b) 0.0623 (c) 0.623 (d) 62.3
  13. 13.0.16 × 2 — where does the decimal point go? (a) 3.2 (b) 0.32 (c) 0.032 (d) 0.0032
  14. 14.7.8 × 7 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 546 (d) 54.6
  15. 15.0.64 × 28 — where does the decimal point go? (a) 1.792 (b) 0.1792 (c) 17.92 (d) 179.2
  16. 16.9.9 × 3 — where does the decimal point go? (a) 2.97 (b) 29.7 (c) 0.297 (d) 297
  17. 17.2.7 × 0.2 — where does the decimal point go? (a) 0.054 (b) 5.4 (c) 0.0054 (d) 0.54
  18. 18.3.4 × 4 — where does the decimal point go? (a) 136 (b) 1.36 (c) 0.136 (d) 13.6
  19. 19.0.74 × 4.6 — where does the decimal point go? (a) 3.404 (b) 34.04 (c) 0.03404 (d) 0.3404
  20. 20.2.7 × 4.7 — where does the decimal point go? (a) 12.69 (b) 1.269 (c) 0.1269 (d) 126.9
  21. 21.0.96 × 0.2 — where does the decimal point go? (a) 0.0192 (b) 1.92 (c) 0.192 (d) 0.00192
  22. 22.0.83 × 9 — where does the decimal point go? (a) 0.0747 (b) 0.747 (c) 74.7 (d) 7.47
  23. 23.0.16 × 14 — where does the decimal point go? (a) 22.4 (b) 0.224 (c) 2.24 (d) 0.0224
  24. 24.9.2 × 2 — where does the decimal point go? (a) 184 (b) 0.184 (c) 18.4 (d) 1.84
  25. 25.5.3 × 16 — where does the decimal point go? (a) 0.848 (b) 8.48 (c) 84.8 (d) 848
  26. 26.1.5 × 5 — where does the decimal point go? (a) 0.75 (b) 7.5 (c) 75 (d) 0.075
  27. 27.0.92 × 47 — where does the decimal point go? (a) 432.4 (b) 0.4324 (c) 43.24 (d) 4.324
  28. 28.0.18 × 0.6 — where does the decimal point go? (a) 0.00108 (b) 0.0108 (c) 0.108 (d) 1.08
  29. 29.2.2 × 4.3 — where does the decimal point go? (a) 0.946 (b) 0.0946 (c) 9.46 (d) 94.6
  30. 30.0.33 × 39 — where does the decimal point go? (a) 1.287 (b) 0.1287 (c) 128.7 (d) 12.87
  31. 31.0.74 × 6 — where does the decimal point go? (a) 0.444 (b) 4.44 (c) 0.0444 (d) 44.4
  32. 32.0.29 × 4.1 — where does the decimal point go? (a) 1.189 (b) 11.89 (c) 0.1189 (d) 0.01189
  33. 33.9.1 × 3 — where does the decimal point go? (a) 27.3 (b) 0.273 (c) 273 (d) 2.73
  34. 34.9.9 × 31 — where does the decimal point go? (a) 30.69 (b) 306.9 (c) 3.069 (d) 3069
  35. 35.3.7 × 0.9 — where does the decimal point go? (a) 0.0333 (b) 0.333 (c) 3.33 (d) 33.3
  36. 36.7.6 × 39 — where does the decimal point go? (a) 2.964 (b) 29.64 (c) 2964 (d) 296.4
  37. 37.0.13 × 16 — where does the decimal point go? (a) 2.08 (b) 20.8 (c) 0.208 (d) 0.0208
  38. 38.4.2 × 27 — where does the decimal point go? (a) 1.134 (b) 113.4 (c) 1134 (d) 11.34
  39. 39.0.56 × 0.3 — where does the decimal point go? (a) 1.68 (b) 0.0168 (c) 0.168 (d) 0.00168
  40. 40.0.26 × 3 — where does the decimal point go? (a) 0.0078 (b) 0.078 (c) 7.8 (d) 0.78

Answer key

  1. 11.7
  2. 1.26
  3. 0.155
  4. 0.76
  5. 0.532
  6. 4.29
  7. 382.2
  8. 148.2
  9. 4.41
  10. 329.3
  11. 16.43
  12. 6.23
  13. 0.32
  14. 54.6
  15. 17.92
  16. 29.7
  17. 0.54
  18. 13.6
  19. 3.404
  20. 12.69
  21. 0.192
  22. 7.47
  23. 2.24
  24. 18.4
  25. 84.8
  26. 7.5
  27. 43.24
  28. 0.108
  29. 9.46
  30. 12.87
  31. 4.44
  32. 1.189
  33. 27.3
  34. 306.9
  35. 3.33
  36. 296.4
  37. 2.08
  38. 113.4
  39. 0.168
  40. 0.78

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