Question

Выполните действие
1/2+1/3;
1/4+2/5;
2/3+1/4;
3/4+2/5;
5/7-1/6;
3/4-1/3;
помогите пожалуйста

Answer 1

1/2  +1/3  = (1*3)/(2*3)  +   (1*2)/(3*2) =  3/6  +  2/6  =5/6
1/4  + 2/5  = 5/20   +  8/20 =  13/20
2/3  +1/4  =  8/12  + 3/12 = 11/12
3/4 + 2/5  = 15/20  + 8/20 = 23/20 = 1   3/20
5/7 -  1/6  = 30/42  -   7/42 = 23/42
3/4  - 1/3 =  9/12  - 4/12 = 5/12