Ответ:
Пошаговое объяснение:
[tex]7)(7\frac{3}{4} -2\frac{5}{7} )*14=(7\frac{21}{28} -2\frac{20}{28} )*14=5\frac{1}{28}*14=\frac{141}{28} *14=\frac{141}{2} =70\frac{1}{2} \\ \\ 8)(15\frac{1}{2} +23\frac{7}{8}):105=(15\frac{4}{8} +23\frac{7}{8}):105=38\frac{11}{8} :105=\frac{315}{8}*\frac{1}{105} =\frac{3}{8} \\ \\ 9)(12\frac{3}{7} -4\frac{4}{6})*7= (12\frac{3}{7} -4\frac{2}{3})*7=(12\frac{9}{21}-4\frac{14}{21})*7=7 \frac{16}{21} *7=\frac{163}{21}*7=\frac{163}{3} =54\frac{1}{3}[/tex]
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Ответ:
Пошаговое объяснение:
[tex]7)(7\frac{3}{4} -2\frac{5}{7} )*14=(7\frac{21}{28} -2\frac{20}{28} )*14=5\frac{1}{28}*14=\frac{141}{28} *14=\frac{141}{2} =70\frac{1}{2} \\ \\ 8)(15\frac{1}{2} +23\frac{7}{8}):105=(15\frac{4}{8} +23\frac{7}{8}):105=38\frac{11}{8} :105=\frac{315}{8}*\frac{1}{105} =\frac{3}{8} \\ \\ 9)(12\frac{3}{7} -4\frac{4}{6})*7= (12\frac{3}{7} -4\frac{2}{3})*7=(12\frac{9}{21}-4\frac{14}{21})*7=7 \frac{16}{21} *7=\frac{163}{21}*7=\frac{163}{3} =54\frac{1}{3}[/tex]