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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 452 · 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. 1.5.4 × 8 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 432 (d) 4.32
  2. 2.0.86 × 0.3 — where does the decimal point go? (a) 0.258 (b) 0.00258 (c) 0.0258 (d) 2.58
  3. 3.1.2 × 42 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 50.4 (d) 504
  4. 4.0.22 × 6 — where does the decimal point go? (a) 0.132 (b) 13.2 (c) 1.32 (d) 0.0132
  5. 5.7.7 × 1.6 — where does the decimal point go? (a) 0.1232 (b) 12.32 (c) 1.232 (d) 123.2
  6. 6.5.8 × 8 — where does the decimal point go? (a) 464 (b) 46.4 (c) 4.64 (d) 0.464
  7. 7.0.32 × 9 — where does the decimal point go? (a) 0.0288 (b) 28.8 (c) 2.88 (d) 0.288
  8. 8.9.8 × 0.3 — where does the decimal point go? (a) 0.294 (b) 2.94 (c) 29.4 (d) 0.0294
  9. 9.3.6 × 19 — where does the decimal point go? (a) 6.84 (b) 68.4 (c) 684 (d) 0.684
  10. 10.0.37 × 42 — where does the decimal point go? (a) 1.554 (b) 15.54 (c) 155.4 (d) 0.1554
  11. 11.0.23 × 5 — where does the decimal point go? (a) 11.5 (b) 1.15 (c) 0.115 (d) 0.0115
  12. 12.7.7 × 0.9 — where does the decimal point go? (a) 6.93 (b) 0.693 (c) 69.3 (d) 0.0693
  13. 13.4.7 × 2 — where does the decimal point go? (a) 0.94 (b) 94 (c) 0.094 (d) 9.4
  14. 14.8.5 × 2.3 — where does the decimal point go? (a) 0.1955 (b) 1.955 (c) 19.55 (d) 195.5
  15. 15.0.62 × 0.3 — where does the decimal point go? (a) 0.0186 (b) 1.86 (c) 0.186 (d) 0.00186
  16. 16.8.2 × 26 — where does the decimal point go? (a) 21.32 (b) 2.132 (c) 2132 (d) 213.2
  17. 17.0.28 × 2.9 — where does the decimal point go? (a) 0.0812 (b) 0.812 (c) 0.00812 (d) 8.12
  18. 18.3.7 × 0.4 — where does the decimal point go? (a) 1.48 (b) 0.0148 (c) 14.8 (d) 0.148
  19. 19.3.2 × 3.6 — where does the decimal point go? (a) 1.152 (b) 11.52 (c) 115.2 (d) 0.1152
  20. 20.0.76 × 2.3 — where does the decimal point go? (a) 1.748 (b) 0.1748 (c) 17.48 (d) 0.01748
  21. 21.0.33 × 6 — where does the decimal point go? (a) 0.198 (b) 0.0198 (c) 1.98 (d) 19.8
  22. 22.5.1 × 0.8 — where does the decimal point go? (a) 0.408 (b) 0.0408 (c) 40.8 (d) 4.08
  23. 23.6.4 × 0.2 — where does the decimal point go? (a) 12.8 (b) 0.0128 (c) 0.128 (d) 1.28
  24. 24.0.77 × 44 — where does the decimal point go? (a) 0.3388 (b) 3.388 (c) 338.8 (d) 33.88
  25. 25.4.4 × 2 — where does the decimal point go? (a) 8.8 (b) 88 (c) 0.088 (d) 0.88
  26. 26.2.4 × 11 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 264 (d) 2.64
  27. 27.5.9 × 39 — where does the decimal point go? (a) 2301 (b) 23.01 (c) 2.301 (d) 230.1
  28. 28.5.6 × 1.8 — where does the decimal point go? (a) 100.8 (b) 1.008 (c) 10.08 (d) 0.1008
  29. 29.0.83 × 3.3 — where does the decimal point go? (a) 2.739 (b) 27.39 (c) 0.2739 (d) 0.02739
  30. 30.0.41 × 7 — where does the decimal point go? (a) 2.87 (b) 28.7 (c) 0.0287 (d) 0.287
  31. 31.1.8 × 0.7 — where does the decimal point go? (a) 1.26 (b) 0.126 (c) 0.0126 (d) 12.6
  32. 32.0.56 × 2.6 — where does the decimal point go? (a) 0.1456 (b) 0.01456 (c) 14.56 (d) 1.456
  33. 33.1.7 × 28 — where does the decimal point go? (a) 476 (b) 47.6 (c) 0.476 (d) 4.76
  34. 34.0.14 × 0.9 — where does the decimal point go? (a) 1.26 (b) 0.126 (c) 0.00126 (d) 0.0126
  35. 35.4.3 × 5 — where does the decimal point go? (a) 0.215 (b) 215 (c) 2.15 (d) 21.5
  36. 36.4.2 × 12 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 504 (d) 5.04
  37. 37.0.16 × 2 — where does the decimal point go? (a) 0.032 (b) 0.0032 (c) 0.32 (d) 3.2
  38. 38.0.47 × 3 — where does the decimal point go? (a) 0.0141 (b) 0.141 (c) 1.41 (d) 14.1
  39. 39.9.6 × 0.8 — where does the decimal point go? (a) 0.0768 (b) 7.68 (c) 0.768 (d) 76.8
  40. 40.0.27 × 9 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 24.3 (d) 0.0243

Answer key

  1. 43.2
  2. 0.258
  3. 50.4
  4. 1.32
  5. 12.32
  6. 46.4
  7. 2.88
  8. 2.94
  9. 68.4
  10. 15.54
  11. 1.15
  12. 6.93
  13. 9.4
  14. 19.55
  15. 0.186
  16. 213.2
  17. 0.812
  18. 1.48
  19. 11.52
  20. 1.748
  21. 1.98
  22. 4.08
  23. 1.28
  24. 33.88
  25. 8.8
  26. 26.4
  27. 230.1
  28. 10.08
  29. 2.739
  30. 2.87
  31. 1.26
  32. 1.456
  33. 47.6
  34. 0.126
  35. 21.5
  36. 50.4
  37. 0.32
  38. 1.41
  39. 7.68
  40. 2.43

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