( + ) : ( - ) =
( 1/3+0,75) : ( 2/3-5/12 ) =((1·4)/(4·3)+3·3/(3·4)): ( (2·4)/12-5/12 ) = =(4+9)/12: ( (8-5)/12 ) =(13/12)·12/3=13/3=4+1/3
Решите задачу: