60-5·5 49:7+17 (68-36):4+48 (42-28)·9-17 (52-48)·(35-28) (27+15):(13-16)

1 ) 60 - 5 · 5 = 60 - 25 = 60 - 20 - 5 = 40 - 5 = 35 2 ) 49 : 7 + 17 = 7 + 17 = 7 + 10 + 7 = 14 + 10 = 24 3 ) (6 8 - 36 ) : 4 + 48 = ( 60 + 8 - 30 - 6 ) / 4 + 48 = ( 30 + 8 - 6 ) / 4 + 48 = ( 30 + 2 ) / 4 + 48 = 32 / 4 + 48 = 8 + 48 = 8 + 40 + 8 = 40 + 16 = 56 4 ) ( 4 2 - 28 ) · 9 - 17 = ( 40 + 2 - 20 - 8 ) * 9 - 17 = ( 20 + 2 - 8 ) * 9 - 17 = ( 20 - 6 ) * 9 - 17 = 14 * 9 - 17 = 10 * 9 + 4 * 9 - 17 = 90 + 36 - 17 = 90 + 30 + 6 - 10 - 7 = 120 - 10 - 1 = 111 - 1 = 110 5 ) ( 5 2 - 48 ) ·( 35 - 28 ) = 4 * 7 = 28 6 ) (27 + 15 ) : (13 - 16 ) = 42 / ( - 3 ) = - 14