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Adding Fractions: traditional approach

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    Adding Fractions: traditional approach - Presentation Transcript

    1. Adding Fractions
    2. +
    3. + =
    4. + =
    5. + =
    6. + = +
    7. + = +
    8. + = + =
    9. + = + =
    10. + = + =
    11. Same denominators: add the numerators!
    12. +
    13. + =
    14. + =
    15. + =
    16. + =
    17. + = +
    18. + = +
    19. + = + =
    20. + = + =
    21. + = + =
    22. + = + =
    23. If the denominators are different, find equivalent fractions, then add numerators
    24. +
    25. + +
    26. + +
    27. + + +
    28. + + +
    29. + + +
    30. + + +
    31. + + + +
    32. + + + +
    33. +
    34. + =
    35. + =
    36. + = =
    37. + = =
      • Check denominators
      • Check denominators
      • Find equivalent fractions so denominators same
      • Check denominators
      • Find equivalent fractions so denominators same
      • Add numerators
      • Check denominators
      • Find equivalent fractions so denominators same
      • Add numerators
      • Cancel down if needed
      • Check denominators
      • Find equivalent fractions so denominators same
      • Add numerators
      • Cancel down if needed
      • Pull out the whole numbers if needed
    43. Your turn…
    44.  
    45.  
    46.  
    47. Sometimes, you have to change both denominators…
    48.  
    49.  
    50. You need a number that is a multiple of both 4 and 5…
    51. =
    52. = =
    53. = = =
    54. = = = =
      • Check denominators
      • Check denominators
      • Find ‘common denominator’ (LCM)
      • Check denominators
      • Find ‘common denominator’ (LCM)
      • Add numerators
      • Check denominators
      • Find ‘common denominator’ (LCM)
      • Add numerators
      • Cancel down if needed
      • Check denominators
      • Find ‘common denominator’ (LCM)
      • Add numerators
      • Cancel down if needed
      • Pull out the whole numbers if needed
    60. Your turn…
    61.  
    62.  
    63.  
    64. Sometimes, you have to add fractions larger than one…
    65. I suggest making these fractions ‘top heavy’.
    66.  
    67. =
    68. = =
    69. = = =
    70. = = = =
    71. Now find an exercise in the book or a work-sheet and practice!

    + keithpeterkeithpeter, 6 months ago

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