Question

даю 40 балівввввввааавв​

Answer 1

Ответ:

А) 4/7 + 2/7 = 6/7;

б) 7/9 - 2/9 = 5/9

в) 4 2/5 + 2 3/5 = 6 5/5=7

г) 1 - 2/7 = 7/7 - 2/7= 5/7