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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 141 · 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. 1.0.62 × 1.7 — where does the decimal point go? (a) 1.054 (b) 0.1054 (c) 0.01054 (d) 10.54
  2. 2.7.6 × 8 — where does the decimal point go? (a) 60.8 (b) 608 (c) 0.608 (d) 6.08
  3. 3.0.29 × 27 — where does the decimal point go? (a) 0.0783 (b) 78.3 (c) 7.83 (d) 0.783
  4. 4.0.92 × 8 — where does the decimal point go? (a) 73.6 (b) 0.736 (c) 0.0736 (d) 7.36
  5. 5.0.85 × 9 — where does the decimal point go? (a) 76.5 (b) 0.765 (c) 7.65 (d) 0.0765
  6. 6.0.18 × 9 — where does the decimal point go? (a) 0.0162 (b) 1.62 (c) 0.162 (d) 16.2
  7. 7.5.7 × 0.7 — where does the decimal point go? (a) 0.399 (b) 0.0399 (c) 39.9 (d) 3.99
  8. 8.0.93 × 8 — where does the decimal point go? (a) 0.0744 (b) 0.744 (c) 74.4 (d) 7.44
  9. 9.2.3 × 8 — where does the decimal point go? (a) 18.4 (b) 184 (c) 0.184 (d) 1.84
  10. 10.2.6 × 4 — where does the decimal point go? (a) 104 (b) 10.4 (c) 1.04 (d) 0.104
  11. 11.4.1 × 4 — where does the decimal point go? (a) 0.164 (b) 1.64 (c) 164 (d) 16.4
  12. 12.0.68 × 3 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.0204 (d) 0.204
  13. 13.6.8 × 0.4 — where does the decimal point go? (a) 0.272 (b) 2.72 (c) 0.0272 (d) 27.2
  14. 14.0.35 × 1.5 — where does the decimal point go? (a) 0.0525 (b) 5.25 (c) 0.00525 (d) 0.525
  15. 15.7.6 × 4 — where does the decimal point go? (a) 30.4 (b) 3.04 (c) 304 (d) 0.304
  16. 16.5.5 × 3 — where does the decimal point go? (a) 1.65 (b) 16.5 (c) 165 (d) 0.165
  17. 17.5.2 × 3 — where does the decimal point go? (a) 1.56 (b) 156 (c) 0.156 (d) 15.6
  18. 18.0.96 × 23 — where does the decimal point go? (a) 0.2208 (b) 220.8 (c) 22.08 (d) 2.208
  19. 19.0.72 × 26 — where does the decimal point go? (a) 187.2 (b) 18.72 (c) 0.1872 (d) 1.872
  20. 20.0.99 × 2 — where does the decimal point go? (a) 0.198 (b) 19.8 (c) 1.98 (d) 0.0198
  21. 21.0.14 × 0.3 — where does the decimal point go? (a) 0.0042 (b) 0.42 (c) 0.00042 (d) 0.042
  22. 22.7.4 × 3.6 — where does the decimal point go? (a) 266.4 (b) 0.2664 (c) 26.64 (d) 2.664
  23. 23.0.79 × 7 — where does the decimal point go? (a) 55.3 (b) 0.553 (c) 5.53 (d) 0.0553
  24. 24.1.7 × 0.9 — where does the decimal point go? (a) 0.0153 (b) 15.3 (c) 0.153 (d) 1.53
  25. 25.7.2 × 0.7 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 0.0504 (d) 50.4
  26. 26.0.42 × 3 — where does the decimal point go? (a) 1.26 (b) 0.126 (c) 0.0126 (d) 12.6
  27. 27.1.4 × 32 — where does the decimal point go? (a) 0.448 (b) 448 (c) 44.8 (d) 4.48
  28. 28.0.35 × 29 — where does the decimal point go? (a) 0.1015 (b) 1.015 (c) 101.5 (d) 10.15
  29. 29.5.4 × 3.4 — where does the decimal point go? (a) 18.36 (b) 0.1836 (c) 183.6 (d) 1.836
  30. 30.4.7 × 7 — where does the decimal point go? (a) 3.29 (b) 329 (c) 0.329 (d) 32.9
  31. 31.7.3 × 17 — where does the decimal point go? (a) 1241 (b) 1.241 (c) 12.41 (d) 124.1
  32. 32.0.81 × 3.9 — where does the decimal point go? (a) 0.03159 (b) 0.3159 (c) 31.59 (d) 3.159
  33. 33.0.52 × 37 — where does the decimal point go? (a) 19.24 (b) 0.1924 (c) 192.4 (d) 1.924
  34. 34.5.1 × 2 — where does the decimal point go? (a) 1.02 (b) 102 (c) 10.2 (d) 0.102
  35. 35.0.25 × 3 — where does the decimal point go? (a) 0.075 (b) 0.75 (c) 0.0075 (d) 7.5
  36. 36.0.18 × 6 — where does the decimal point go? (a) 0.0108 (b) 10.8 (c) 1.08 (d) 0.108
  37. 37.3.7 × 0.5 — where does the decimal point go? (a) 1.85 (b) 0.0185 (c) 0.185 (d) 18.5
  38. 38.7.5 × 0.9 — where does the decimal point go? (a) 0.675 (b) 67.5 (c) 6.75 (d) 0.0675
  39. 39.0.47 × 3 — where does the decimal point go? (a) 0.0141 (b) 0.141 (c) 1.41 (d) 14.1
  40. 40.0.99 × 39 — where does the decimal point go? (a) 386.1 (b) 0.3861 (c) 38.61 (d) 3.861

Answer key

  1. 1.054
  2. 60.8
  3. 7.83
  4. 7.36
  5. 7.65
  6. 1.62
  7. 3.99
  8. 7.44
  9. 18.4
  10. 10.4
  11. 16.4
  12. 2.04
  13. 2.72
  14. 0.525
  15. 30.4
  16. 16.5
  17. 15.6
  18. 22.08
  19. 18.72
  20. 1.98
  21. 0.042
  22. 26.64
  23. 5.53
  24. 1.53
  25. 5.04
  26. 1.26
  27. 44.8
  28. 10.15
  29. 18.36
  30. 32.9
  31. 124.1
  32. 3.159
  33. 19.24
  34. 10.2
  35. 0.75
  36. 1.08
  37. 1.85
  38. 6.75
  39. 1.41
  40. 38.61

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