А)5.7/22.8=57/228=1/4
б)(1 1/4)/(1 1/2)=(5/4)/(3/2)=(5/4)*(2/3)=5/6
в)(4.6*2.1*0.5)/(3.5*2.3*0.3)=(2*7*1)/(7*1*1)=14/7=2
г)(6.8*0.04*1.65)/(3.3*5.1*0.16)=(4*1*1)/(2*3*4)=4/24=1/6
д)(0.804:1.2+0.33)/(9.5:2.4-3 11/12)=24
1)0.804:1.2=0.67
2)0.67+0.33=1
3)9.5:2.4=95/24
4)95/24-3 11/12=95/24-47/12=95/24-94/24=1/24
5)1/1/24=24
е)((3 1/2+1 4/5)*3/5-1.18)/(8 1/8*2/13+1 1/3:1 7/9)=
1)3 1/2 +1 4/5=7/2+9/5=35/10+18/10=53/10
2)53/10*3/5=159/50=3.18
3)3.18-1.18=2
4)8 1/8*2/13=9/8*2/13=9/52
5)1 1/3:1 7/9=4/3:16/9=4/3*9/16=3/4
6)9/52+3/4=9/52+39/52=48/52=24/26=12/13
7)2/(12/13)=2*13/12=26/12=13/6=2целых 1/6