7 18 : 4 34 * 8 = 11 13 : 421 : 4 14 = 1 79 * 2 25 : 1 35 = 78 * 89 : 1 19 = ЗАРАНИЯ СПАСИБО !

7 ( 1/8 ) : 4 ( 3/4 ) * 8 = ( 57/8 ) : ( 19/4 ) * 8 = ( 57/8 ) * ( 4/19 ) * 8 = 12 ОТВЕТ 12 ---------------11 ( 1/3 ) : ( 4/21 ) : 4 ( 1/4 ) = ( 34/3 ) : ( 4/21 ) : ( 17/4 ) = ( 34/3 ) * ( 21/4 ) : ( 17/4 ) = ( 714/12 ) * ( 4/17 ) = 42/3 = 14  ОТВЕТ 14 ----------------1 ( 7/9 ) * 2 ( 2/5 ) : 1 ( 3/5 ) = ( 16/9 ) * ( 12/5 ) : ( 8/5 ) = ( 16/9 ) * ( 12/5 ) * ( 5/8 ) = 24/9 = 2 ( 6/9 ) = 2 ( 2/3 )ОТВЕТ 2 ( 2/3 )--------------------( 7/8 ) * ( 8/9 ) : 1 ( 1/9 ) = ( 7/9 ) * ( 9/10 ) = 7/10 = 0,7ОТВЕТ 0,7