# i have a problem of understanding how to add and subtract fractions without the same denomenatori need expert or simple explaning

• 2

fist you will have to take the L.C.M only of denominators for Ex:

57 28 910

the L.C.M of 7 8 and 10 is 560

then take the denominatorand the numerator

5 then multiply the numerator when done with denominator=5 multiplied by 80 to get the numerator=400(multiply the numerator with the number multiplied by the denominator to get the L.C.M

7 multiplied by 80 to get the L.C.M=560

do the same with other fractions

at some point of time the denominators will be same (560)

then add the numerator.

• 0

fist you will have to take the L.C.M only of denominators for Ex:

5 7 2 8 9 10

the L.C.M of 7 8 and 10 is 560

then take the denominatorand the numerator

5 then multiply the numerator when done with denominator=5 multiplied by 80 to get the numerator=400(multiply the numerator with the number multiplied by the denominator to get the L.C.M

7 multiplied by 80 to get the L.C.M=560

do the same with other fractions

at some point of time the denominators will be same (560)

then add the numerator.

• 0
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