Question

(3/4 - 5/6)•3+(3/4+5/6)•4

Answer 1

1)3/4-5/6= -1/12
-1/12*3=-1/4
3/4+5/6=1 7/12
1 7/12*4=6 1/3
-1/4+1/3=1/12

Answer 2

спасибо