Giải thích các bước giải:
11.
= $\frac{14}{15}$ . $\frac{25}{21}$ : $\frac{11}{2}$ . $\frac{121}{12}$ + $\frac{5}{6}$ - $\frac{1}{3}$
= $\frac{10}{9}$ : $\frac{11}{2}$ . $\frac{121}{12}$ + $\frac{5}{6}$ - $\frac{1}{3}$
= $\frac{20}{99}$ . $\frac{121}{12}$ + $\frac{5}{6}$ - $\frac{1}{3}$
= $\frac{55}{21}$ + $\frac{5}{6}$ - $\frac{1}{3}$
= $\frac{155}{54}$ - $\frac{1}{3}$
= $\frac{137}{54}$
12.
= $\frac{5}{3}$($\frac{-5}{18}$) : $\frac{1}{2}$ - $\frac{9}{5}$ : $\frac{18}{15}$ + $\frac{-8}{3}$
= $\frac{-25}{54}$ : $\frac{1}{2}$ - $\frac{3}{2}$ + $\frac{-8}{3}$
= $\frac{-25}{27}$ - $\frac{3}{2}$ + $\frac{-8}{3}$
= $\frac{-131}{54}$ + $\frac{-8}{3}$
= $\frac{-275}{54}$
13.
= $\frac{4}{5}$( $\frac{5}{6}$) : $\frac{-3}{2}$ + $\frac{7}{4}$ : $\frac{21}{8}$ + $\frac{5}{3}$($\frac{3}{10}$)
= $\frac{2}{3}$ : $\frac{-3}{2}$ + $\frac{2}{3}$ + $\frac{1}{2}$
= $\frac{-4}{9}$ + $\frac{2}{3}$ + $\frac{1}{2}$
= $\frac{2}{9}$ + $\frac{1}{2}$
= $\frac{13}{18}$
14.
= $\frac{1}{4}$ + $\frac{10}{3}$( $\frac{-11}{20}$)- $\frac{6}{5}$( $\frac{-1}{2}$)
= $\frac{1}{4}$ + $\frac{-11}{6}$ - $\frac{-3}{5}$
= $\frac{-19}{12}$ - $\frac{-3}{5}$
= $\frac{-59}{60}$
