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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 237 · 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. 1.0.12 × 0.2 — where does the decimal point go? (a) 0.24 (b) 0.00024 (c) 0.024 (d) 0.0024
  2. 2.9.7 × 0.4 — where does the decimal point go? (a) 0.388 (b) 3.88 (c) 0.0388 (d) 38.8
  3. 3.0.53 × 7 — where does the decimal point go? (a) 37.1 (b) 0.0371 (c) 3.71 (d) 0.371
  4. 4.0.66 × 49 — where does the decimal point go? (a) 323.4 (b) 3.234 (c) 0.3234 (d) 32.34
  5. 5.0.22 × 2 — where does the decimal point go? (a) 0.044 (b) 0.44 (c) 0.0044 (d) 4.4
  6. 6.0.46 × 3.6 — where does the decimal point go? (a) 0.01656 (b) 16.56 (c) 0.1656 (d) 1.656
  7. 7.8.3 × 0.8 — where does the decimal point go? (a) 0.0664 (b) 66.4 (c) 6.64 (d) 0.664
  8. 8.4.9 × 8 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 392 (d) 0.392
  9. 9.8.8 × 0.2 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 0.0176 (d) 17.6
  10. 10.4.3 × 0.3 — where does the decimal point go? (a) 1.29 (b) 12.9 (c) 0.129 (d) 0.0129
  11. 11.4.7 × 0.3 — where does the decimal point go? (a) 0.141 (b) 14.1 (c) 1.41 (d) 0.0141
  12. 12.9.8 × 0.2 — where does the decimal point go? (a) 19.6 (b) 0.196 (c) 0.0196 (d) 1.96
  13. 13.6.9 × 5 — where does the decimal point go? (a) 0.345 (b) 34.5 (c) 3.45 (d) 345
  14. 14.0.89 × 8 — where does the decimal point go? (a) 0.712 (b) 0.0712 (c) 7.12 (d) 71.2
  15. 15.0.66 × 0.7 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 0.00462 (d) 0.0462
  16. 16.6.4 × 12 — where does the decimal point go? (a) 76.8 (b) 0.768 (c) 768 (d) 7.68
  17. 17.1.6 × 2 — where does the decimal point go? (a) 0.32 (b) 32 (c) 0.032 (d) 3.2
  18. 18.6.7 × 0.4 — where does the decimal point go? (a) 2.68 (b) 26.8 (c) 0.268 (d) 0.0268
  19. 19.9.4 × 6 — where does the decimal point go? (a) 564 (b) 56.4 (c) 5.64 (d) 0.564
  20. 20.9.4 × 0.7 — where does the decimal point go? (a) 0.0658 (b) 6.58 (c) 65.8 (d) 0.658
  21. 21.0.83 × 1.1 — where does the decimal point go? (a) 9.13 (b) 0.00913 (c) 0.0913 (d) 0.913
  22. 22.7.9 × 11 — where does the decimal point go? (a) 8.69 (b) 0.869 (c) 86.9 (d) 869
  23. 23.0.12 × 3 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 3.6 (d) 0.36
  24. 24.4.2 × 42 — where does the decimal point go? (a) 176.4 (b) 1.764 (c) 1764 (d) 17.64
  25. 25.5.9 × 7 — where does the decimal point go? (a) 413 (b) 41.3 (c) 0.413 (d) 4.13
  26. 26.2.3 × 3 — where does the decimal point go? (a) 0.69 (b) 69 (c) 6.9 (d) 0.069
  27. 27.9.5 × 9 — where does the decimal point go? (a) 85.5 (b) 8.55 (c) 855 (d) 0.855
  28. 28.9.3 × 1.9 — where does the decimal point go? (a) 17.67 (b) 176.7 (c) 0.1767 (d) 1.767
  29. 29.6.8 × 0.3 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 0.0204 (d) 20.4
  30. 30.0.63 × 3.3 — where does the decimal point go? (a) 0.02079 (b) 20.79 (c) 2.079 (d) 0.2079
  31. 31.0.26 × 2 — where does the decimal point go? (a) 0.052 (b) 0.52 (c) 5.2 (d) 0.0052
  32. 32.9.8 × 8 — where does the decimal point go? (a) 0.784 (b) 78.4 (c) 784 (d) 7.84
  33. 33.1.8 × 2 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 36 (d) 3.6
  34. 34.9.2 × 8 — where does the decimal point go? (a) 73.6 (b) 736 (c) 7.36 (d) 0.736
  35. 35.0.36 × 4.1 — where does the decimal point go? (a) 0.01476 (b) 14.76 (c) 0.1476 (d) 1.476
  36. 36.4.3 × 16 — where does the decimal point go? (a) 6.88 (b) 0.688 (c) 688 (d) 68.8
  37. 37.3.8 × 0.7 — where does the decimal point go? (a) 26.6 (b) 0.0266 (c) 0.266 (d) 2.66
  38. 38.8.6 × 8 — where does the decimal point go? (a) 6.88 (b) 68.8 (c) 0.688 (d) 688
  39. 39.5.6 × 4 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 224 (d) 22.4
  40. 40.7.8 × 37 — where does the decimal point go? (a) 28.86 (b) 2.886 (c) 2886 (d) 288.6

Answer key

  1. 0.024
  2. 3.88
  3. 3.71
  4. 32.34
  5. 0.44
  6. 1.656
  7. 6.64
  8. 39.2
  9. 1.76
  10. 1.29
  11. 1.41
  12. 1.96
  13. 34.5
  14. 7.12
  15. 0.462
  16. 76.8
  17. 3.2
  18. 2.68
  19. 56.4
  20. 6.58
  21. 0.913
  22. 86.9
  23. 0.36
  24. 176.4
  25. 41.3
  26. 6.9
  27. 85.5
  28. 17.67
  29. 2.04
  30. 2.079
  31. 0.52
  32. 78.4
  33. 3.6
  34. 73.6
  35. 1.476
  36. 68.8
  37. 2.66
  38. 68.8
  39. 22.4
  40. 288.6

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