ГДЗ по математике 5 класс Мерзляк ФГОС Задание 1068

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\[1)\ 1\frac{3}{22} \cdot 2\frac{14}{15} - \left( 1\frac{5}{8} + 2\frac{1}{8} \cdot \frac{11}{17} \right) \cdot \frac{3}{7} =\]

\[= \frac{25}{22} \cdot \frac{44}{15} - \left( 1\frac{5}{8} + \frac{17}{8} \cdot \frac{11}{17} \right) \cdot \frac{3}{7} =\]

\[= \frac{5 \cdot 2}{1 \cdot 3} - \left( 1\frac{5}{8} + \frac{1 \cdot 11}{8 \cdot 1} \right) \cdot \frac{3}{7} =\]

\[= \frac{10}{3} - \left( \frac{13}{8} + \frac{11}{8} \right) \cdot \frac{3}{7} =\]

\[= \frac{10}{3} - \frac{24}{8} \cdot \frac{3}{7} =\]

\[= \frac{10^{\backslash 7}}{3} - \frac{9^{\backslash 3}}{7} = \frac{70 - 27}{21} = \frac{43}{21} =\]

\[= 2\frac{1}{21}.\]

\[2)\ 6\frac{2}{5} \cdot 1\frac{9}{16} - \left( 2\frac{1}{4} \right)^{2} =\]

\[= \frac{32}{5} \cdot \frac{25}{16} - \left( \frac{9}{4} \right)^{2} = \frac{2 \cdot 5}{1 \cdot 1} - \frac{81}{16} =\]

\[= 10 - 5\frac{1}{16} = 9\frac{16}{16} - 5\frac{1}{16} =\]

\[= 4\frac{15}{16}\]