Решите и распишите 1)(-4 1/12+3 9/10):3 3/10= 2)(11/14-5/6):(11/14-3/4)=

Ответ:

1) $(-4\frac{1}{12} +3\frac{9}{10} ):3\frac{3}{10} =(-\frac{49}{12} +\frac{39}{10} ):\frac{33}{10} =\frac{-49*5+39*6}{60} *\frac{10}{33} =-\frac{11}{60} *\frac{10}{33} =-\frac{1}{18}$

2) $(\frac{11}{14} -\frac{5}{6} ):(\frac{11}{14} -\frac{3}{4} )=\frac{11*3-5*7}{42} :(\frac{11}{14} -\frac{3}{4} )=-\frac{1}{21} :\frac{11*2-3*7}{28} =-\frac{1}{21}*\frac{28}{1} =-1\frac{1}{3}$