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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 725 · 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. 1.1.4 × 43 — where does the decimal point go? (a) 6.02 (b) 0.602 (c) 602 (d) 60.2
  2. 2.5.1 × 3 — where does the decimal point go? (a) 15.3 (b) 1.53 (c) 153 (d) 0.153
  3. 3.9.7 × 2.6 — where does the decimal point go? (a) 25.22 (b) 2.522 (c) 0.2522 (d) 252.2
  4. 4.0.65 × 0.5 — where does the decimal point go? (a) 0.325 (b) 0.00325 (c) 0.0325 (d) 3.25
  5. 5.3.1 × 0.9 — where does the decimal point go? (a) 27.9 (b) 2.79 (c) 0.0279 (d) 0.279
  6. 6.6.9 × 7 — where does the decimal point go? (a) 48.3 (b) 4.83 (c) 483 (d) 0.483
  7. 7.9.3 × 4.7 — where does the decimal point go? (a) 4.371 (b) 437.1 (c) 43.71 (d) 0.4371
  8. 8.4.4 × 2 — where does the decimal point go? (a) 88 (b) 0.088 (c) 8.8 (d) 0.88
  9. 9.0.98 × 44 — where does the decimal point go? (a) 0.4312 (b) 431.2 (c) 4.312 (d) 43.12
  10. 10.0.16 × 0.4 — where does the decimal point go? (a) 0.64 (b) 0.0064 (c) 0.064 (d) 0.00064
  11. 11.6.8 × 0.4 — where does the decimal point go? (a) 0.0272 (b) 0.272 (c) 27.2 (d) 2.72
  12. 12.0.13 × 0.9 — where does the decimal point go? (a) 0.00117 (b) 0.0117 (c) 0.117 (d) 1.17
  13. 13.0.76 × 3.7 — where does the decimal point go? (a) 28.12 (b) 0.02812 (c) 2.812 (d) 0.2812
  14. 14.0.82 × 2 — where does the decimal point go? (a) 0.0164 (b) 1.64 (c) 0.164 (d) 16.4
  15. 15.0.63 × 3 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 1.89 (d) 18.9
  16. 16.1.3 × 41 — where does the decimal point go? (a) 53.3 (b) 5.33 (c) 533 (d) 0.533
  17. 17.0.59 × 9 — where does the decimal point go? (a) 53.1 (b) 5.31 (c) 0.0531 (d) 0.531
  18. 18.2.8 × 4 — where does the decimal point go? (a) 1.12 (b) 11.2 (c) 0.112 (d) 112
  19. 19.0.76 × 4.4 — where does the decimal point go? (a) 3.344 (b) 33.44 (c) 0.03344 (d) 0.3344
  20. 20.0.67 × 7 — where does the decimal point go? (a) 0.469 (b) 0.0469 (c) 4.69 (d) 46.9
  21. 21.1.8 × 2 — where does the decimal point go? (a) 0.036 (b) 36 (c) 3.6 (d) 0.36
  22. 22.0.72 × 0.7 — where does the decimal point go? (a) 0.0504 (b) 5.04 (c) 0.504 (d) 0.00504
  23. 23.9.5 × 5 — where does the decimal point go? (a) 0.475 (b) 47.5 (c) 475 (d) 4.75
  24. 24.0.89 × 0.9 — where does the decimal point go? (a) 0.00801 (b) 0.0801 (c) 0.801 (d) 8.01
  25. 25.8.7 × 0.4 — where does the decimal point go? (a) 3.48 (b) 0.348 (c) 34.8 (d) 0.0348
  26. 26.0.96 × 4 — where does the decimal point go? (a) 3.84 (b) 0.384 (c) 0.0384 (d) 38.4
  27. 27.6.4 × 0.7 — where does the decimal point go? (a) 0.448 (b) 4.48 (c) 44.8 (d) 0.0448
  28. 28.0.86 × 1.2 — where does the decimal point go? (a) 10.32 (b) 1.032 (c) 0.01032 (d) 0.1032
  29. 29.3.1 × 5 — where does the decimal point go? (a) 15.5 (b) 1.55 (c) 155 (d) 0.155
  30. 30.0.14 × 8 — where does the decimal point go? (a) 0.0112 (b) 0.112 (c) 1.12 (d) 11.2
  31. 31.2.7 × 0.6 — where does the decimal point go? (a) 16.2 (b) 1.62 (c) 0.162 (d) 0.0162
  32. 32.0.76 × 7 — where does the decimal point go? (a) 53.2 (b) 0.0532 (c) 0.532 (d) 5.32
  33. 33.2.7 × 0.3 — where does the decimal point go? (a) 8.1 (b) 0.81 (c) 0.081 (d) 0.0081
  34. 34.0.97 × 5 — where does the decimal point go? (a) 0.0485 (b) 0.485 (c) 4.85 (d) 48.5
  35. 35.0.73 × 2 — where does the decimal point go? (a) 0.146 (b) 0.0146 (c) 1.46 (d) 14.6
  36. 36.1.8 × 4.7 — where does the decimal point go? (a) 0.846 (b) 8.46 (c) 84.6 (d) 0.0846
  37. 37.0.82 × 19 — where does the decimal point go? (a) 1.558 (b) 0.1558 (c) 15.58 (d) 155.8
  38. 38.8.9 × 42 — where does the decimal point go? (a) 3738 (b) 3.738 (c) 373.8 (d) 37.38
  39. 39.0.59 × 0.7 — where does the decimal point go? (a) 4.13 (b) 0.00413 (c) 0.413 (d) 0.0413
  40. 40.0.43 × 0.5 — where does the decimal point go? (a) 0.215 (b) 0.00215 (c) 0.0215 (d) 2.15

Answer key

  1. 60.2
  2. 15.3
  3. 25.22
  4. 0.325
  5. 2.79
  6. 48.3
  7. 43.71
  8. 8.8
  9. 43.12
  10. 0.064
  11. 2.72
  12. 0.117
  13. 2.812
  14. 1.64
  15. 1.89
  16. 53.3
  17. 5.31
  18. 11.2
  19. 3.344
  20. 4.69
  21. 3.6
  22. 0.504
  23. 47.5
  24. 0.801
  25. 3.48
  26. 3.84
  27. 4.48
  28. 1.032
  29. 15.5
  30. 1.12
  31. 1.62
  32. 5.32
  33. 0.81
  34. 4.85
  35. 1.46
  36. 8.46
  37. 15.58
  38. 373.8
  39. 0.413
  40. 0.215

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