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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 384 · 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. 1.0.27 × 4 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 0.0108 (d) 10.8
  2. 2.1.3 × 4 — where does the decimal point go? (a) 5.2 (b) 0.052 (c) 52 (d) 0.52
  3. 3.0.65 × 7 — where does the decimal point go? (a) 4.55 (b) 0.0455 (c) 0.455 (d) 45.5
  4. 4.0.42 × 0.8 — where does the decimal point go? (a) 3.36 (b) 0.0336 (c) 0.00336 (d) 0.336
  5. 5.3.4 × 9 — where does the decimal point go? (a) 3.06 (b) 30.6 (c) 0.306 (d) 306
  6. 6.0.41 × 3 — where does the decimal point go? (a) 1.23 (b) 0.123 (c) 12.3 (d) 0.0123
  7. 7.2.7 × 35 — where does the decimal point go? (a) 945 (b) 9.45 (c) 94.5 (d) 0.945
  8. 8.3.4 × 48 — where does the decimal point go? (a) 163.2 (b) 1632 (c) 16.32 (d) 1.632
  9. 9.0.26 × 0.8 — where does the decimal point go? (a) 0.0208 (b) 2.08 (c) 0.00208 (d) 0.208
  10. 10.0.89 × 2 — where does the decimal point go? (a) 0.0178 (b) 1.78 (c) 17.8 (d) 0.178
  11. 11.2.6 × 19 — where does the decimal point go? (a) 494 (b) 4.94 (c) 49.4 (d) 0.494
  12. 12.0.94 × 37 — where does the decimal point go? (a) 3.478 (b) 0.3478 (c) 34.78 (d) 347.8
  13. 13.9.5 × 0.3 — where does the decimal point go? (a) 0.0285 (b) 2.85 (c) 28.5 (d) 0.285
  14. 14.0.97 × 5 — where does the decimal point go? (a) 0.0485 (b) 4.85 (c) 0.485 (d) 48.5
  15. 15.0.29 × 16 — where does the decimal point go? (a) 46.4 (b) 4.64 (c) 0.0464 (d) 0.464
  16. 16.7.3 × 6 — where does the decimal point go? (a) 4.38 (b) 43.8 (c) 438 (d) 0.438
  17. 17.0.88 × 2 — where does the decimal point go? (a) 1.76 (b) 0.0176 (c) 0.176 (d) 17.6
  18. 18.8.4 × 0.3 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 0.0252
  19. 19.7.9 × 1.5 — where does the decimal point go? (a) 0.1185 (b) 118.5 (c) 1.185 (d) 11.85
  20. 20.2.2 × 37 — where does the decimal point go? (a) 814 (b) 8.14 (c) 81.4 (d) 0.814
  21. 21.0.75 × 13 — where does the decimal point go? (a) 0.0975 (b) 97.5 (c) 9.75 (d) 0.975
  22. 22.0.68 × 3 — where does the decimal point go? (a) 2.04 (b) 20.4 (c) 0.0204 (d) 0.204
  23. 23.0.46 × 39 — where does the decimal point go? (a) 0.1794 (b) 17.94 (c) 179.4 (d) 1.794
  24. 24.8.2 × 14 — where does the decimal point go? (a) 11.48 (b) 1.148 (c) 1148 (d) 114.8
  25. 25.9.7 × 3 — where does the decimal point go? (a) 291 (b) 29.1 (c) 0.291 (d) 2.91
  26. 26.4.1 × 9 — where does the decimal point go? (a) 0.369 (b) 36.9 (c) 3.69 (d) 369
  27. 27.3.7 × 4 — where does the decimal point go? (a) 1.48 (b) 0.148 (c) 148 (d) 14.8
  28. 28.0.19 × 3.8 — where does the decimal point go? (a) 0.0722 (b) 0.722 (c) 7.22 (d) 0.00722
  29. 29.0.73 × 22 — where does the decimal point go? (a) 16.06 (b) 160.6 (c) 0.1606 (d) 1.606
  30. 30.2.3 × 4.6 — where does the decimal point go? (a) 10.58 (b) 105.8 (c) 1.058 (d) 0.1058
  31. 31.3.2 × 0.8 — where does the decimal point go? (a) 25.6 (b) 2.56 (c) 0.256 (d) 0.0256
  32. 32.0.96 × 4 — where does the decimal point go? (a) 3.84 (b) 0.384 (c) 0.0384 (d) 38.4
  33. 33.0.21 × 0.8 — where does the decimal point go? (a) 0.0168 (b) 0.00168 (c) 0.168 (d) 1.68
  34. 34.0.23 × 0.2 — where does the decimal point go? (a) 0.046 (b) 0.00046 (c) 0.46 (d) 0.0046
  35. 35.0.69 × 4.9 — where does the decimal point go? (a) 0.3381 (b) 33.81 (c) 0.03381 (d) 3.381
  36. 36.0.28 × 0.9 — where does the decimal point go? (a) 0.0252 (b) 0.252 (c) 0.00252 (d) 2.52
  37. 37.0.91 × 1.8 — where does the decimal point go? (a) 0.01638 (b) 16.38 (c) 1.638 (d) 0.1638
  38. 38.7.8 × 0.9 — where does the decimal point go? (a) 0.702 (b) 0.0702 (c) 7.02 (d) 70.2
  39. 39.0.23 × 45 — where does the decimal point go? (a) 0.1035 (b) 10.35 (c) 1.035 (d) 103.5
  40. 40.6.4 × 4 — where does the decimal point go? (a) 256 (b) 0.256 (c) 25.6 (d) 2.56

Answer key

  1. 1.08
  2. 5.2
  3. 4.55
  4. 0.336
  5. 30.6
  6. 1.23
  7. 94.5
  8. 163.2
  9. 0.208
  10. 1.78
  11. 49.4
  12. 34.78
  13. 2.85
  14. 4.85
  15. 4.64
  16. 43.8
  17. 1.76
  18. 2.52
  19. 11.85
  20. 81.4
  21. 9.75
  22. 2.04
  23. 17.94
  24. 114.8
  25. 29.1
  26. 36.9
  27. 14.8
  28. 0.722
  29. 16.06
  30. 10.58
  31. 2.56
  32. 3.84
  33. 0.168
  34. 0.046
  35. 3.381
  36. 0.252
  37. 1.638
  38. 7.02
  39. 10.35
  40. 25.6

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