0,75а-б÷8.1/11 при а =11 1/3 и б=8,9
0.75а - b: 8 1/11= 0.75a=75/100a=3/4a a=11 1/3=34/3 b=8.9=8 9/10=89/10 8 1/11=89/11 3/4a -b : (89/11)= (3/4)*(34/3) - (89/10):(89/11)= 34/4 -(89/10*11/89)= 17/2-11/10= 8.5 - 1.1=7.4