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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 275 · 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. 1.0.79 × 2 — where does the decimal point go? (a) 1.58 (b) 0.158 (c) 15.8 (d) 0.0158
  2. 2.0.59 × 3.3 — where does the decimal point go? (a) 1.947 (b) 0.01947 (c) 19.47 (d) 0.1947
  3. 3.0.38 × 9 — where does the decimal point go? (a) 34.2 (b) 0.342 (c) 0.0342 (d) 3.42
  4. 4.0.57 × 2 — where does the decimal point go? (a) 11.4 (b) 0.0114 (c) 1.14 (d) 0.114
  5. 5.3.7 × 2.4 — where does the decimal point go? (a) 88.8 (b) 0.888 (c) 8.88 (d) 0.0888
  6. 6.2.9 × 2.3 — where does the decimal point go? (a) 66.7 (b) 0.0667 (c) 0.667 (d) 6.67
  7. 7.0.42 × 4.2 — where does the decimal point go? (a) 17.64 (b) 1.764 (c) 0.01764 (d) 0.1764
  8. 8.0.82 × 32 — where does the decimal point go? (a) 2.624 (b) 26.24 (c) 0.2624 (d) 262.4
  9. 9.1.6 × 0.6 — where does the decimal point go? (a) 0.0096 (b) 0.096 (c) 9.6 (d) 0.96
  10. 10.0.94 × 3 — where does the decimal point go? (a) 0.282 (b) 2.82 (c) 0.0282 (d) 28.2
  11. 11.0.36 × 4 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 0.0144 (d) 14.4
  12. 12.0.86 × 4.3 — where does the decimal point go? (a) 36.98 (b) 0.3698 (c) 0.03698 (d) 3.698
  13. 13.5.2 × 0.9 — where does the decimal point go? (a) 0.468 (b) 4.68 (c) 0.0468 (d) 46.8
  14. 14.0.58 × 2 — where does the decimal point go? (a) 11.6 (b) 0.0116 (c) 1.16 (d) 0.116
  15. 15.2.2 × 9 — where does the decimal point go? (a) 0.198 (b) 198 (c) 1.98 (d) 19.8
  16. 16.9.2 × 1.9 — where does the decimal point go? (a) 1.748 (b) 0.1748 (c) 174.8 (d) 17.48
  17. 17.0.23 × 3.8 — where does the decimal point go? (a) 0.00874 (b) 0.0874 (c) 0.874 (d) 8.74
  18. 18.5.9 × 2.5 — where does the decimal point go? (a) 147.5 (b) 0.1475 (c) 14.75 (d) 1.475
  19. 19.2.7 × 3 — where does the decimal point go? (a) 0.081 (b) 8.1 (c) 0.81 (d) 81
  20. 20.0.44 × 39 — where does the decimal point go? (a) 0.1716 (b) 1.716 (c) 17.16 (d) 171.6
  21. 21.1.5 × 3 — where does the decimal point go? (a) 0.45 (b) 4.5 (c) 0.045 (d) 45
  22. 22.5.3 × 0.2 — where does the decimal point go? (a) 10.6 (b) 0.106 (c) 1.06 (d) 0.0106
  23. 23.4.9 × 0.8 — where does the decimal point go? (a) 0.0392 (b) 0.392 (c) 39.2 (d) 3.92
  24. 24.6.3 × 33 — where does the decimal point go? (a) 2.079 (b) 2079 (c) 20.79 (d) 207.9
  25. 25.0.97 × 2 — where does the decimal point go? (a) 0.0194 (b) 19.4 (c) 0.194 (d) 1.94
  26. 26.0.17 × 23 — where does the decimal point go? (a) 0.391 (b) 39.1 (c) 3.91 (d) 0.0391
  27. 27.0.33 × 0.3 — where does the decimal point go? (a) 0.00099 (b) 0.099 (c) 0.0099 (d) 0.99
  28. 28.1.3 × 1.4 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 0.182 (d) 18.2
  29. 29.0.19 × 2.1 — where does the decimal point go? (a) 0.00399 (b) 0.399 (c) 0.0399 (d) 3.99
  30. 30.4.1 × 4.6 — where does the decimal point go? (a) 0.1886 (b) 18.86 (c) 188.6 (d) 1.886
  31. 31.1.6 × 39 — where does the decimal point go? (a) 62.4 (b) 0.624 (c) 6.24 (d) 624
  32. 32.9.1 × 7 — where does the decimal point go? (a) 0.637 (b) 6.37 (c) 637 (d) 63.7
  33. 33.9.1 × 0.5 — where does the decimal point go? (a) 0.0455 (b) 4.55 (c) 0.455 (d) 45.5
  34. 34.0.91 × 2.3 — where does the decimal point go? (a) 20.93 (b) 0.02093 (c) 0.2093 (d) 2.093
  35. 35.0.44 × 6 — where does the decimal point go? (a) 26.4 (b) 2.64 (c) 0.264 (d) 0.0264
  36. 36.0.34 × 26 — where does the decimal point go? (a) 0.884 (b) 0.0884 (c) 88.4 (d) 8.84
  37. 37.0.16 × 0.4 — where does the decimal point go? (a) 0.64 (b) 0.00064 (c) 0.0064 (d) 0.064
  38. 38.4.6 × 7 — where does the decimal point go? (a) 0.322 (b) 32.2 (c) 3.22 (d) 322
  39. 39.0.62 × 4 — where does the decimal point go? (a) 0.248 (b) 2.48 (c) 0.0248 (d) 24.8
  40. 40.0.23 × 3 — where does the decimal point go? (a) 0.069 (b) 0.0069 (c) 0.69 (d) 6.9

Answer key

  1. 1.58
  2. 1.947
  3. 3.42
  4. 1.14
  5. 8.88
  6. 6.67
  7. 1.764
  8. 26.24
  9. 0.96
  10. 2.82
  11. 1.44
  12. 3.698
  13. 4.68
  14. 1.16
  15. 19.8
  16. 17.48
  17. 0.874
  18. 14.75
  19. 8.1
  20. 17.16
  21. 4.5
  22. 1.06
  23. 3.92
  24. 207.9
  25. 1.94
  26. 3.91
  27. 0.099
  28. 1.82
  29. 0.399
  30. 18.86
  31. 62.4
  32. 63.7
  33. 4.55
  34. 2.093
  35. 2.64
  36. 8.84
  37. 0.064
  38. 32.2
  39. 2.48
  40. 0.69

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