(0,54:1,35+3/5:2 1/4+(-1/6))*4 --------------------------------- (1,75+1/5):(-2 3/5)

(54/100  : 135/100+35/10 : 9/4-16/10 ) *4= 54/100 * 100/135 +35/10 * 4/9 -16/10 )*4 = (2/5 + 7*2/9- 8/5 )*4 = (2/5 -8/5+14/9)*4= (- 6/5 +14/9)*4=  (-54/45+70/45)*4=   16 /45 *4= 64/45= 1 целая 19 /45 (1,75+1/5) : (-2 3/5)= (1,75+0,2) : ( - 13/5) = 1,95 *( - 5 /13 )= 195/100*(- 5/13)= - 75/100 = - 0 , 75