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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 628 · 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. 1.0.49 × 13 — where does the decimal point go? (a) 0.637 (b) 6.37 (c) 63.7 (d) 0.0637
  2. 2.0.16 × 13 — where does the decimal point go? (a) 0.0208 (b) 0.208 (c) 2.08 (d) 20.8
  3. 3.0.23 × 3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.0069 (d) 0.69
  4. 4.0.29 × 0.8 — where does the decimal point go? (a) 0.0232 (b) 2.32 (c) 0.00232 (d) 0.232
  5. 5.0.57 × 41 — where does the decimal point go? (a) 23.37 (b) 2.337 (c) 0.2337 (d) 233.7
  6. 6.2.7 × 16 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 4.32 (d) 432
  7. 7.4.3 × 9 — where does the decimal point go? (a) 38.7 (b) 387 (c) 0.387 (d) 3.87
  8. 8.0.26 × 43 — where does the decimal point go? (a) 0.1118 (b) 11.18 (c) 111.8 (d) 1.118
  9. 9.0.24 × 12 — where does the decimal point go? (a) 28.8 (b) 0.0288 (c) 0.288 (d) 2.88
  10. 10.0.69 × 0.2 — where does the decimal point go? (a) 0.0138 (b) 1.38 (c) 0.00138 (d) 0.138
  11. 11.0.61 × 39 — where does the decimal point go? (a) 0.2379 (b) 2.379 (c) 23.79 (d) 237.9
  12. 12.8.8 × 7 — where does the decimal point go? (a) 61.6 (b) 616 (c) 6.16 (d) 0.616
  13. 13.0.74 × 2.1 — where does the decimal point go? (a) 1.554 (b) 0.01554 (c) 15.54 (d) 0.1554
  14. 14.0.32 × 0.8 — where does the decimal point go? (a) 0.00256 (b) 0.0256 (c) 2.56 (d) 0.256
  15. 15.0.94 × 1.6 — where does the decimal point go? (a) 0.1504 (b) 15.04 (c) 1.504 (d) 0.01504
  16. 16.5.7 × 0.8 — where does the decimal point go? (a) 0.0456 (b) 0.456 (c) 4.56 (d) 45.6
  17. 17.0.23 × 36 — where does the decimal point go? (a) 0.0828 (b) 0.828 (c) 82.8 (d) 8.28
  18. 18.3.5 × 5 — where does the decimal point go? (a) 175 (b) 0.175 (c) 17.5 (d) 1.75
  19. 19.4.4 × 2 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 8.8 (d) 88
  20. 20.9.8 × 0.2 — where does the decimal point go? (a) 0.0196 (b) 1.96 (c) 0.196 (d) 19.6
  21. 21.9.4 × 11 — where does the decimal point go? (a) 10.34 (b) 1034 (c) 1.034 (d) 103.4
  22. 22.5.6 × 0.3 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 0.0168
  23. 23.3.9 × 4.3 — where does the decimal point go? (a) 167.7 (b) 16.77 (c) 0.1677 (d) 1.677
  24. 24.8.8 × 14 — where does the decimal point go? (a) 123.2 (b) 12.32 (c) 1232 (d) 1.232
  25. 25.0.16 × 0.6 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.00096 (d) 0.096
  26. 26.0.19 × 1.2 — where does the decimal point go? (a) 0.228 (b) 0.0228 (c) 2.28 (d) 0.00228
  27. 27.7.2 × 9 — where does the decimal point go? (a) 64.8 (b) 648 (c) 6.48 (d) 0.648
  28. 28.7.4 × 0.8 — where does the decimal point go? (a) 5.92 (b) 0.0592 (c) 59.2 (d) 0.592
  29. 29.0.79 × 3.6 — where does the decimal point go? (a) 2.844 (b) 0.2844 (c) 28.44 (d) 0.02844
  30. 30.0.94 × 0.3 — where does the decimal point go? (a) 0.282 (b) 0.00282 (c) 0.0282 (d) 2.82
  31. 31.7.7 × 4.2 — where does the decimal point go? (a) 32.34 (b) 323.4 (c) 0.3234 (d) 3.234
  32. 32.1.3 × 12 — where does the decimal point go? (a) 156 (b) 0.156 (c) 15.6 (d) 1.56
  33. 33.5.5 × 45 — where does the decimal point go? (a) 24.75 (b) 2.475 (c) 2475 (d) 247.5
  34. 34.0.81 × 0.4 — where does the decimal point go? (a) 0.00324 (b) 3.24 (c) 0.0324 (d) 0.324
  35. 35.3.1 × 9 — where does the decimal point go? (a) 0.279 (b) 27.9 (c) 2.79 (d) 279
  36. 36.5.5 × 0.3 — where does the decimal point go? (a) 16.5 (b) 0.0165 (c) 1.65 (d) 0.165
  37. 37.0.96 × 7 — where does the decimal point go? (a) 67.2 (b) 6.72 (c) 0.672 (d) 0.0672
  38. 38.4.4 × 0.6 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 26.4 (d) 2.64
  39. 39.9.9 × 7 — where does the decimal point go? (a) 0.693 (b) 6.93 (c) 69.3 (d) 693
  40. 40.3.9 × 4.1 — where does the decimal point go? (a) 159.9 (b) 15.99 (c) 0.1599 (d) 1.599

Answer key

  1. 6.37
  2. 2.08
  3. 0.69
  4. 0.232
  5. 23.37
  6. 43.2
  7. 38.7
  8. 11.18
  9. 2.88
  10. 0.138
  11. 23.79
  12. 61.6
  13. 1.554
  14. 0.256
  15. 1.504
  16. 4.56
  17. 8.28
  18. 17.5
  19. 8.8
  20. 1.96
  21. 103.4
  22. 1.68
  23. 16.77
  24. 123.2
  25. 0.096
  26. 0.228
  27. 64.8
  28. 5.92
  29. 2.844
  30. 0.282
  31. 32.34
  32. 15.6
  33. 247.5
  34. 0.324
  35. 27.9
  36. 1.65
  37. 6.72
  38. 2.64
  39. 69.3
  40. 15.99

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