Question

Надо срочно, пожалуйста

Answer 1

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) $3 frac{5}{12}-27 frac{1}{6}=3 frac{5}{12}-27 frac{2}{12} =-26 frac{x}{y} frac{14}{12} +3 frac{5}{12}=-23 frac{9}{12} =-23 frac{3}{4} =-23,75$