1)32,8/15 -[-4.2/3]   
2)[12.3/7]*[-14/29]
3[-1.1/3]:[-2/3]
4)[-28.5/9]-[6.2/3]
спосите срочно

спасибо тебе ;)

С радостью))

1) 32 ( 8/15 ) - ( - 4 ( 2/3 )) = 32 ( 8/15 ) + 4 (  2/3 ) = 32 ( 8/15 ) + 4 ( 10/15 ) = = 36 ( 18/15 ) = 37 ( 3/15 ) = 37 ( 1/5 ) = 37,2 -----------------------------------------------------------------------------------------2) 12 ( 3/7 ) * ( - 14/29 ) = 87/7 * ( - 14/29 ) = ( - 6 )---------------------------------------------------------------------------------------3) - 1 ( 1/3 ) : ( - 2/3 ) = ( - 4/3 ) * ( - 3/2 ) = 2 -----------------------------------------------------------------------------------------4) - 28 ( 5/9 ) - 6 ( 2/3 ) = - [ 28 ( 5/9 ) + 6 ( 6/9 ) ] = - 34 ( 11/9 ) = - 35 ( 2/9 )