Надо срочно, пожалуйста

1) $13 \frac{3}{4}+9 \frac{1}{6}=(13+9)+( \frac{3}{4}+ \frac{1}{6})=22+ \frac{9+2}{12}=22 \frac{11}{12}$
2) $22 \frac{11}{12}*1,2= \frac{275}{12}* \frac{12}{10}=2,75$
3) $10,3 -8 \frac{1}{2}=10,3-8,5 =1,8$
4) $1,8* \frac{5}{9}= \frac{1,8*5}{9} =0,2*5=1$
5) $2,75 :1 =2,75$
6) $6,8 - 3 \frac{3}{5}=6,8-3,6=3,2$
7) $3,2*5 \frac{5}{6} = \frac{32*35}{10*6} = \frac{56}{3}$
8) $3 \frac{2}{3}-3 \frac{1}{6}=3 \frac{4}{6} -3 \frac{1}{6}= \frac{1}{2}$
9) $\frac{1}{2}*56=28$
10) $\frac{56}{3}:28= \frac{56*1}{3*28}= \frac{2}{3}$
11) $2,75 + \frac{2}{3}=2 + ( \frac{3}{4} + \frac{2}{3})=2+ \frac{9+8}{12}=2+ \frac{17}{12} =3 \frac{5}{12}$
12) $3 \frac{5}{12}-27 \frac{1}{6}=3 \frac{5}{12}-27 \frac{2}{12} =-26 \frac{x}{y} \frac{14}{12} +3 \frac{5}{12}=-23 \frac{9}{12} =-23 \frac{3}{4} =-23,75$