Пример 1)
1) ( 1/3 ) + ( 1/4 ) = ( 4/12 ) + ( 3/12 ) = 7/12 ;
2) 2 - ( 5/6 ) = 1 ( 1/6 ) = 7/6 ;
3) ( 7/12 ) : ( 7/6 ) = 6/12 = 1/2
ОТВЕТ : 1/2 ;
Пример 2)
1) ( 1/2 ) + ( 1/4 ) - ( 2/5 ) = ( 10/20 ) + ( 5/20 ) - ( 8/20 ) = 7/20 ;
2) ( 7/20 ) : ( 4/5 ) = 35/80 = 7/16 ; ОТВЕТ : 7/16