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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 916 · 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. 1.0.33 × 0.3 — where does the decimal point go? (a) 0.099 (b) 0.00099 (c) 0.0099 (d) 0.99
  2. 2.1.8 × 4.2 — where does the decimal point go? (a) 75.6 (b) 7.56 (c) 0.756 (d) 0.0756
  3. 3.9.1 × 4 — where does the decimal point go? (a) 364 (b) 36.4 (c) 3.64 (d) 0.364
  4. 4.0.56 × 0.6 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 0.00336 (d) 0.0336
  5. 5.2.8 × 9 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 25.2 (d) 252
  6. 6.5.3 × 4.2 — where does the decimal point go? (a) 22.26 (b) 222.6 (c) 0.2226 (d) 2.226
  7. 7.4.3 × 15 — where does the decimal point go? (a) 6.45 (b) 0.645 (c) 645 (d) 64.5
  8. 8.3.7 × 0.9 — where does the decimal point go? (a) 0.0333 (b) 0.333 (c) 33.3 (d) 3.33
  9. 9.8.4 × 4 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 33.6 (d) 336
  10. 10.0.44 × 6 — where does the decimal point go? (a) 26.4 (b) 0.264 (c) 0.0264 (d) 2.64
  11. 11.3.7 × 0.7 — where does the decimal point go? (a) 2.59 (b) 0.259 (c) 25.9 (d) 0.0259
  12. 12.0.55 × 35 — where does the decimal point go? (a) 19.25 (b) 1.925 (c) 192.5 (d) 0.1925
  13. 13.0.16 × 0.6 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.00096 (d) 0.96
  14. 14.4.3 × 6 — where does the decimal point go? (a) 258 (b) 25.8 (c) 2.58 (d) 0.258
  15. 15.7.2 × 0.2 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 14.4 (d) 0.0144
  16. 16.6.8 × 6 — where does the decimal point go? (a) 40.8 (b) 4.08 (c) 408 (d) 0.408
  17. 17.0.12 × 6 — where does the decimal point go? (a) 0.0072 (b) 7.2 (c) 0.072 (d) 0.72
  18. 18.5.2 × 2 — where does the decimal point go? (a) 104 (b) 0.104 (c) 10.4 (d) 1.04
  19. 19.0.75 × 0.9 — where does the decimal point go? (a) 0.0675 (b) 6.75 (c) 0.00675 (d) 0.675
  20. 20.0.26 × 28 — where does the decimal point go? (a) 0.728 (b) 72.8 (c) 7.28 (d) 0.0728
  21. 21.5.9 × 4 — where does the decimal point go? (a) 0.236 (b) 236 (c) 2.36 (d) 23.6
  22. 22.0.86 × 0.3 — where does the decimal point go? (a) 0.258 (b) 0.00258 (c) 0.0258 (d) 2.58
  23. 23.8.5 × 9 — where does the decimal point go? (a) 7.65 (b) 765 (c) 76.5 (d) 0.765
  24. 24.0.32 × 0.4 — where does the decimal point go? (a) 0.0128 (b) 1.28 (c) 0.00128 (d) 0.128
  25. 25.4.6 × 6 — where does the decimal point go? (a) 27.6 (b) 2.76 (c) 0.276 (d) 276
  26. 26.5.6 × 0.7 — where does the decimal point go? (a) 0.392 (b) 0.0392 (c) 39.2 (d) 3.92
  27. 27.0.59 × 5 — where does the decimal point go? (a) 0.0295 (b) 29.5 (c) 0.295 (d) 2.95
  28. 28.0.77 × 7 — where does the decimal point go? (a) 0.0539 (b) 0.539 (c) 5.39 (d) 53.9
  29. 29.7.3 × 2.7 — where does the decimal point go? (a) 0.1971 (b) 1.971 (c) 197.1 (d) 19.71
  30. 30.0.19 × 0.3 — where does the decimal point go? (a) 0.00057 (b) 0.0057 (c) 0.57 (d) 0.057
  31. 31.0.12 × 1.8 — where does the decimal point go? (a) 0.00216 (b) 2.16 (c) 0.216 (d) 0.0216
  32. 32.9.2 × 4.2 — where does the decimal point go? (a) 38.64 (b) 3.864 (c) 386.4 (d) 0.3864
  33. 33.0.79 × 6 — where does the decimal point go? (a) 0.0474 (b) 47.4 (c) 4.74 (d) 0.474
  34. 34.0.71 × 1.1 — where does the decimal point go? (a) 7.81 (b) 0.0781 (c) 0.781 (d) 0.00781
  35. 35.6.6 × 29 — where does the decimal point go? (a) 1.914 (b) 1914 (c) 19.14 (d) 191.4
  36. 36.4.5 × 0.3 — where does the decimal point go? (a) 13.5 (b) 0.0135 (c) 0.135 (d) 1.35
  37. 37.1.4 × 0.3 — where does the decimal point go? (a) 4.2 (b) 0.042 (c) 0.0042 (d) 0.42
  38. 38.2.9 × 0.3 — where does the decimal point go? (a) 0.087 (b) 8.7 (c) 0.87 (d) 0.0087
  39. 39.2.5 × 3 — where does the decimal point go? (a) 75 (b) 0.075 (c) 7.5 (d) 0.75
  40. 40.0.86 × 3 — where does the decimal point go? (a) 25.8 (b) 2.58 (c) 0.258 (d) 0.0258

Answer key

  1. 0.099
  2. 7.56
  3. 36.4
  4. 0.336
  5. 25.2
  6. 22.26
  7. 64.5
  8. 3.33
  9. 33.6
  10. 2.64
  11. 2.59
  12. 19.25
  13. 0.096
  14. 25.8
  15. 1.44
  16. 40.8
  17. 0.72
  18. 10.4
  19. 0.675
  20. 7.28
  21. 23.6
  22. 0.258
  23. 76.5
  24. 0.128
  25. 27.6
  26. 3.92
  27. 2.95
  28. 5.39
  29. 19.71
  30. 0.057
  31. 0.216
  32. 38.64
  33. 4.74
  34. 0.781
  35. 191.4
  36. 1.35
  37. 0.42
  38. 0.87
  39. 7.5
  40. 2.58

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