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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 668 · 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. 1.0.36 × 3.3 — where does the decimal point go? (a) 11.88 (b) 0.01188 (c) 0.1188 (d) 1.188
  2. 2.8.2 × 3.1 — where does the decimal point go? (a) 25.42 (b) 2.542 (c) 0.2542 (d) 254.2
  3. 3.0.32 × 8 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 25.6 (d) 0.0256
  4. 4.0.85 × 2.1 — where does the decimal point go? (a) 0.1785 (b) 17.85 (c) 0.01785 (d) 1.785
  5. 5.6.9 × 4.3 — where does the decimal point go? (a) 0.2967 (b) 296.7 (c) 2.967 (d) 29.67
  6. 6.0.68 × 0.7 — where does the decimal point go? (a) 0.476 (b) 4.76 (c) 0.0476 (d) 0.00476
  7. 7.0.13 × 4 — where does the decimal point go? (a) 0.52 (b) 0.052 (c) 0.0052 (d) 5.2
  8. 8.1.5 × 21 — where does the decimal point go? (a) 0.315 (b) 31.5 (c) 3.15 (d) 315
  9. 9.6.5 × 7 — where does the decimal point go? (a) 4.55 (b) 455 (c) 45.5 (d) 0.455
  10. 10.7.6 × 4.4 — where does the decimal point go? (a) 334.4 (b) 0.3344 (c) 3.344 (d) 33.44
  11. 11.0.74 × 0.6 — where does the decimal point go? (a) 0.00444 (b) 4.44 (c) 0.444 (d) 0.0444
  12. 12.7.4 × 28 — where does the decimal point go? (a) 2.072 (b) 207.2 (c) 2072 (d) 20.72
  13. 13.0.89 × 3 — where does the decimal point go? (a) 0.267 (b) 2.67 (c) 26.7 (d) 0.0267
  14. 14.3.2 × 0.2 — where does the decimal point go? (a) 0.0064 (b) 0.064 (c) 6.4 (d) 0.64
  15. 15.2.5 × 5 — where does the decimal point go? (a) 12.5 (b) 0.125 (c) 125 (d) 1.25
  16. 16.0.29 × 0.3 — where does the decimal point go? (a) 0.0087 (b) 0.087 (c) 0.00087 (d) 0.87
  17. 17.0.97 × 3 — where does the decimal point go? (a) 2.91 (b) 29.1 (c) 0.291 (d) 0.0291
  18. 18.0.82 × 0.9 — where does the decimal point go? (a) 0.738 (b) 7.38 (c) 0.00738 (d) 0.0738
  19. 19.6.6 × 0.4 — where does the decimal point go? (a) 2.64 (b) 26.4 (c) 0.264 (d) 0.0264
  20. 20.0.34 × 0.8 — where does the decimal point go? (a) 0.00272 (b) 0.0272 (c) 0.272 (d) 2.72
  21. 21.0.78 × 3 — where does the decimal point go? (a) 23.4 (b) 0.0234 (c) 2.34 (d) 0.234
  22. 22.7.9 × 6 — where does the decimal point go? (a) 47.4 (b) 4.74 (c) 0.474 (d) 474
  23. 23.6.2 × 3 — where does the decimal point go? (a) 1.86 (b) 186 (c) 18.6 (d) 0.186
  24. 24.8.9 × 0.5 — where does the decimal point go? (a) 0.445 (b) 4.45 (c) 44.5 (d) 0.0445
  25. 25.0.93 × 0.7 — where does the decimal point go? (a) 0.651 (b) 0.0651 (c) 6.51 (d) 0.00651
  26. 26.0.66 × 1.2 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 0.792 (d) 0.00792
  27. 27.7.9 × 0.8 — where does the decimal point go? (a) 0.632 (b) 0.0632 (c) 6.32 (d) 63.2
  28. 28.0.24 × 8 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 0.0192 (d) 1.92
  29. 29.5.7 × 16 — where does the decimal point go? (a) 0.912 (b) 91.2 (c) 912 (d) 9.12
  30. 30.3.8 × 26 — where does the decimal point go? (a) 988 (b) 98.8 (c) 9.88 (d) 0.988
  31. 31.3.9 × 4.8 — where does the decimal point go? (a) 1.872 (b) 18.72 (c) 0.1872 (d) 187.2
  32. 32.5.8 × 14 — where does the decimal point go? (a) 0.812 (b) 812 (c) 8.12 (d) 81.2
  33. 33.1.9 × 4.1 — where does the decimal point go? (a) 0.779 (b) 77.9 (c) 0.0779 (d) 7.79
  34. 34.0.39 × 24 — where does the decimal point go? (a) 0.936 (b) 93.6 (c) 0.0936 (d) 9.36
  35. 35.2.1 × 0.2 — where does the decimal point go? (a) 4.2 (b) 0.42 (c) 0.0042 (d) 0.042
  36. 36.8.2 × 2.9 — where does the decimal point go? (a) 0.2378 (b) 23.78 (c) 2.378 (d) 237.8
  37. 37.0.99 × 0.5 — where does the decimal point go? (a) 0.495 (b) 0.0495 (c) 0.00495 (d) 4.95
  38. 38.4.6 × 4 — where does the decimal point go? (a) 1.84 (b) 184 (c) 0.184 (d) 18.4
  39. 39.7.7 × 21 — where does the decimal point go? (a) 161.7 (b) 1617 (c) 1.617 (d) 16.17
  40. 40.9.4 × 22 — where does the decimal point go? (a) 20.68 (b) 206.8 (c) 2.068 (d) 2068

Answer key

  1. 1.188
  2. 25.42
  3. 2.56
  4. 1.785
  5. 29.67
  6. 0.476
  7. 0.52
  8. 31.5
  9. 45.5
  10. 33.44
  11. 0.444
  12. 207.2
  13. 2.67
  14. 0.64
  15. 12.5
  16. 0.087
  17. 2.91
  18. 0.738
  19. 2.64
  20. 0.272
  21. 2.34
  22. 47.4
  23. 18.6
  24. 4.45
  25. 0.651
  26. 0.792
  27. 6.32
  28. 1.92
  29. 91.2
  30. 98.8
  31. 18.72
  32. 81.2
  33. 7.79
  34. 9.36
  35. 0.42
  36. 23.78
  37. 0.495
  38. 18.4
  39. 161.7
  40. 206.8

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