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? asked in Science & MathematicsMathematics · 10 years ago

subtracting fractions?

i kindof forgot how to subtract fractions. could someone help me with these few?

c/4 - d/2 = c-2d/4 (is that right? or did i do something wrong)

k/2 - 5/3= ?

s/1 - 2/r =?

3/r^2 - 2/r=

Update:

i also have a divison fraction:

3x/2y (divided by) 5/6y= ?

2 Answers

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  • Mike G
    Lv 7
    10 years ago
    Favorite Answer

    c/4 - d/2 = (c-2d)/4

    k/2 - 5/3= (3k-10)/6

    s/1 - 2/r = (rs-2)/r

    3/r^2 - 2/r=(3-2r)r^2

    3x/2y (divided by) 5/6y=

    3x/2y * 6y/5 = 9x/5

  • Steven Ham
    Lv 5
    10 years ago

    You got the first one right. Just use the same method for the rest.

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