5th grade Math

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How do you add fractions with different denominators? Thanks if you help :)

  • 5th grade Math -

    You must either

    change the fractions to equivalent fractions with a common denominator


    change the factions to equivalent decimals.

  • 5th grade Math -

    In google type :

    add fractions with different denominators

    You wil find many, many sites.

  • 5th grade Math -

    can't do it. Fractions with different denominators are different animals. Think of the denominator as a unit. A half is not the same as a third, just as apples are not oranges.

    So, in order to add them, you need to convert them into the same units. To add 2/3 + 1/2, you have to make them somehow the same kind of thing.

    If you cut a pie into 6 pieces, two of those pieces make 1/3, and 3 of them make 1/2. So, to do the addition, change things up so that

    2/3 + 1/2
    = 4/6 + 3/6
    Now everything is the same kind of object: sixths
    Now you can add them up
    4/6+3/6 = 7/6 = 1 1/6

    So, learn about something called the Lowest Common Denominator. To add fractions with different denominators, convert them so they are all multiples of the LCD. Then they can be added.

    2/7 + 3/5 + 1/3
    = 30/105 + 63/105 + 35/105
    = 128/105

  • 5th grade Math -

    Don't think about to much to much baby

  • 5th grade Math -

    Adding fractions is simple I will have this as a blog

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