ГДЗ по математике 5 класс Мерзляк ФГОС Задание 1148

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\[1)\ 2\frac{13^{\backslash 3}}{14} + 1\frac{20^{\backslash 2}}{21} =\]

\[= 2\frac{39}{42} + 1\frac{40}{42} = 3\frac{79}{42} = 4\frac{37}{42} =\]

\[= \frac{205}{42} \Longrightarrow \frac{42}{205}\]

\[2)\ 8\frac{3^{\backslash 3}}{4} - 7\frac{5^{\backslash 2}}{6} = 8\frac{9}{12} - 7\frac{10}{12} =\]

\[= 7\frac{21}{12} - 7\frac{10}{12} = \frac{11}{12} \Longrightarrow \frac{12}{11}\]