Найдите значения выражений: а)3 1/3 * (2 3/4 : 5 1/2) б)2 2/5 : (3 2/5 - 1 11/15)

a) [latex]1)2 \frac{3}{4} :5 \frac{1}{2} = \frac{11}{4} * \frac{2}{11} = \frac{1}{2} [/latex] [latex]2)3 \frac{1}{3} * \frac{1}{2} = \frac{10}{3} * \frac{1}{2} = \frac{5}{3} =1 \frac{2}{3} [/latex] б) [latex]1)3 \frac{2}{5} -1 \frac{11}{15} =3 \frac{6}{15} -1 \frac{11}{15} =2 \frac{21}{15} -1 \frac{11}{15} =1 \frac{2}{3} [/latex] [latex]2)2 \frac{2}{5} :1 \frac{2}{3} = \frac{12}{5} : \frac{5}{3} = \frac{12}{5} * \frac{3}{5} = \frac{36}{25} =1 \frac{11}{25} [/latex]