ggegh3rr2 5 1/3:6 2\5+(12:3 3/5-2/3)* 2\3+7 2/5 =11 17/30по действиям 12:3 3/5=12:18/5=12*5/18=2*5/3=10/310/3-2/3=8/38/3*2/3=16/9
 5 1/3:6 2\5=16/3:32/5=16/3*5/32=1/3*5/2=5/6
10/3+5/6=20/6+5/6=25/6=4 1/64 1/6+7 2/5 =11 1/6+2/5=11 5/30+12/30=11 17/30

криро1828 1) (3,5+2 1/3)/(3,5-2 1/3)=(35/10+7/3)/(35/10-7/3)=(105/30+70/30)/(105/30-70/30) =175/30÷35/30=175/30×30/35=5
2) (16-8 1/3)/(-2 5/9)=(48/3-25/3)/(-23/9)=23/3÷(-23/9)=23/3×(-9/23)= -3
3)-10 8/61-12.5×(-2/9)2= -618/61+125/45×2= -618/61+25/9×2= -618/61+50/9=
-5562/549+3050/549= -2512/549= -4 316/549