( 7,42 * 5/9 - (-11,48) : 1 4/5) : 0,35 =
= (371/50 * 5/9 - ( - 287/25) * 5/9) * 100/35 =
= (371/50 + 287/25 ) * 5/9 * 20/7 =
= ( 371 / 50 + 574/50 ) * 100/63 =
= 945/50 * 100/63 = (15 * 2) / (1*1) =
= 30
по действиям (если нужно) :
1) 7,42 * 5/9 = 742/100 * 5/9 = 371/50 * 5/9 =
=(371*1)/(10*9) = 371/90 = 4 11/90
2) - 11,48 : 1 4/5 = - 1148/100 * 5/9 = - 287/25 * 5/9 =
= - (287*1)/(5*9) = - 287/45 = - 6 17/45
3) 4 11/90 - (-6 17/45) = 4 11/90 + 6 34/90 = 10 45/90 = 10,5
4) 10,5 : 0,35 = 1050/35 = 30