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}