Решебник по математике 6 класс Виленкин Часть 1, 2 Часть 1. Параграф 2. Действия со смешанными числами Задание 558

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\[\textbf{а)}\ \frac{3,1}{1,7} + \frac{6,7}{5,1} = \frac{31^{\backslash 3}}{17} + \frac{67}{51} =\]

\[= \frac{93}{51} + \frac{67}{51} = \frac{160}{51} = 3\frac{7}{51}\]

\[\textbf{б)}\ \frac{2,5}{4,4} + \frac{4,6}{13,2} = \frac{25^{\backslash 3}}{44} + \frac{46}{132} =\]

\[= \frac{75}{132} + \frac{46}{132} = \frac{121}{132} = \frac{11}{12}\]

\[\textbf{в)}\ \frac{6,8}{7,2} - \frac{2,7}{3,6} = \frac{68}{72} - \frac{27^{\backslash 2}}{36} =\]

\[= \frac{34}{36} - \frac{27}{36} = \frac{7}{36}\]

\[\textbf{г)}\ \frac{2,4}{7,7} - \frac{2,8}{12,1} = \frac{24^{\backslash 11}}{77} - \frac{28^{\backslash 7}}{121} =\]

\[= \frac{264}{847} - \frac{196}{847} = \frac{68}{847}\]