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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 909 · 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. 1.8.3 × 0.2 — where does the decimal point go? (a) 0.0166 (b) 0.166 (c) 1.66 (d) 16.6
  2. 2.0.34 × 0.9 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 0.00306 (d) 0.0306
  3. 3.0.23 × 24 — where does the decimal point go? (a) 5.52 (b) 0.552 (c) 55.2 (d) 0.0552
  4. 4.7.4 × 7 — where does the decimal point go? (a) 518 (b) 51.8 (c) 0.518 (d) 5.18
  5. 5.1.8 × 36 — where does the decimal point go? (a) 64.8 (b) 648 (c) 6.48 (d) 0.648
  6. 6.4.8 × 0.4 — where does the decimal point go? (a) 0.0192 (b) 19.2 (c) 1.92 (d) 0.192
  7. 7.0.34 × 8 — where does the decimal point go? (a) 27.2 (b) 0.272 (c) 2.72 (d) 0.0272
  8. 8.5.3 × 1.9 — where does the decimal point go? (a) 0.1007 (b) 1.007 (c) 100.7 (d) 10.07
  9. 9.6.4 × 0.6 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 3.84 (d) 0.0384
  10. 10.6.3 × 1.4 — where does the decimal point go? (a) 8.82 (b) 88.2 (c) 0.882 (d) 0.0882
  11. 11.5.3 × 42 — where does the decimal point go? (a) 2226 (b) 2.226 (c) 222.6 (d) 22.26
  12. 12.3.8 × 7 — where does the decimal point go? (a) 0.266 (b) 26.6 (c) 266 (d) 2.66
  13. 13.6.3 × 2 — where does the decimal point go? (a) 1.26 (b) 126 (c) 12.6 (d) 0.126
  14. 14.9.3 × 1.2 — where does the decimal point go? (a) 111.6 (b) 1.116 (c) 0.1116 (d) 11.16
  15. 15.0.56 × 4 — where does the decimal point go? (a) 0.224 (b) 22.4 (c) 2.24 (d) 0.0224
  16. 16.1.6 × 4.3 — where does the decimal point go? (a) 6.88 (b) 0.0688 (c) 68.8 (d) 0.688
  17. 17.0.18 × 8 — where does the decimal point go? (a) 14.4 (b) 0.144 (c) 1.44 (d) 0.0144
  18. 18.0.81 × 0.4 — where does the decimal point go? (a) 0.00324 (b) 0.0324 (c) 3.24 (d) 0.324
  19. 19.0.36 × 21 — where does the decimal point go? (a) 7.56 (b) 0.0756 (c) 0.756 (d) 75.6
  20. 20.1.3 × 14 — where does the decimal point go? (a) 182 (b) 0.182 (c) 1.82 (d) 18.2
  21. 21.0.32 × 1.1 — where does the decimal point go? (a) 0.352 (b) 0.00352 (c) 3.52 (d) 0.0352
  22. 22.0.47 × 4.7 — where does the decimal point go? (a) 0.02209 (b) 22.09 (c) 0.2209 (d) 2.209
  23. 23.0.17 × 8 — where does the decimal point go? (a) 0.0136 (b) 1.36 (c) 0.136 (d) 13.6
  24. 24.8.1 × 7 — where does the decimal point go? (a) 5.67 (b) 56.7 (c) 0.567 (d) 567
  25. 25.6.4 × 3 — where does the decimal point go? (a) 19.2 (b) 0.192 (c) 192 (d) 1.92
  26. 26.4.6 × 3 — where does the decimal point go? (a) 138 (b) 0.138 (c) 13.8 (d) 1.38
  27. 27.0.52 × 3.6 — where does the decimal point go? (a) 0.01872 (b) 1.872 (c) 18.72 (d) 0.1872
  28. 28.2.2 × 49 — where does the decimal point go? (a) 1.078 (b) 107.8 (c) 10.78 (d) 1078
  29. 29.1.7 × 4 — where does the decimal point go? (a) 68 (b) 6.8 (c) 0.068 (d) 0.68
  30. 30.3.7 × 19 — where does the decimal point go? (a) 703 (b) 0.703 (c) 7.03 (d) 70.3
  31. 31.9.6 × 3.9 — where does the decimal point go? (a) 374.4 (b) 0.3744 (c) 3.744 (d) 37.44
  32. 32.9.5 × 11 — where does the decimal point go? (a) 1045 (b) 10.45 (c) 104.5 (d) 1.045
  33. 33.2.9 × 0.5 — where does the decimal point go? (a) 14.5 (b) 0.145 (c) 0.0145 (d) 1.45
  34. 34.8.4 × 2 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 0.168 (d) 168
  35. 35.0.79 × 5 — where does the decimal point go? (a) 0.0395 (b) 39.5 (c) 3.95 (d) 0.395
  36. 36.0.81 × 0.6 — where does the decimal point go? (a) 0.0486 (b) 4.86 (c) 0.00486 (d) 0.486
  37. 37.0.73 × 1.7 — where does the decimal point go? (a) 12.41 (b) 0.01241 (c) 1.241 (d) 0.1241
  38. 38.8.5 × 7 — where does the decimal point go? (a) 59.5 (b) 0.595 (c) 595 (d) 5.95
  39. 39.3.7 × 3 — where does the decimal point go? (a) 1.11 (b) 0.111 (c) 11.1 (d) 111
  40. 40.0.32 × 0.6 — where does the decimal point go? (a) 0.192 (b) 1.92 (c) 0.0192 (d) 0.00192

Answer key

  1. 1.66
  2. 0.306
  3. 5.52
  4. 51.8
  5. 64.8
  6. 1.92
  7. 2.72
  8. 10.07
  9. 3.84
  10. 8.82
  11. 222.6
  12. 26.6
  13. 12.6
  14. 11.16
  15. 2.24
  16. 6.88
  17. 1.44
  18. 0.324
  19. 7.56
  20. 18.2
  21. 0.352
  22. 2.209
  23. 1.36
  24. 56.7
  25. 19.2
  26. 13.8
  27. 1.872
  28. 107.8
  29. 6.8
  30. 70.3
  31. 37.44
  32. 104.5
  33. 1.45
  34. 16.8
  35. 3.95
  36. 0.486
  37. 1.241
  38. 59.5
  39. 11.1
  40. 0.192

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