А) 11/6*24/10 - 7/4*24/10=22/5 - 21/5=1/5
b) (5 - 3 75/100)*8/15=125/100*8/15=2/3
c) ( - 375/100+33/16)*16=( - 15/4+33/16)*16= - 15/4*16+33/16*16= - 27
d) 1+15/100 : (11/12 - 75/100)=1+15/100 : (2/12)=1+15/100*6=1 9/10
е) (44/5-138/10*6/23)*12/13=(44/5-18/5)*12/13=4 4/5