Forum - - adding and subtracting fractions

- adding and subtracting fractions

adding fractions

rule1

example1

2/3 + 1/7

► answer

example2

${\frac {1}{2}} + {\frac {1}{3}} = {\frac {3}{6}}+{\frac {2}{6}} = {\frac {5}{6}}$

example3

$\tfrac14\ + \tfrac13=\tfrac{1*3}{4*3}\ + \tfrac{1*4}{3*4}=\tfrac3{12}\ + \tfrac4{12}=\tfrac7{12}$ .

subtracting fractions

rule2

$\frac{a}{b} - \frac{c}{d} = \frac{ad - bc}{bd}$

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