Question

РЕШИТЕ!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Решение:
1) $5,75 - 6 \frac{1}{7} = 5 \frac{3}{4} - 6 \frac{1}{7} = 5 \frac{21}{28} - 6 \frac{4}{28} = - (6 \frac{4}{28} - 5 \frac{21}{28} ) =$$- (5 \frac{32}{28} - 5 \frac{21}{28} ) = - \frac{11}{28}$
2) $-2,28 + 0,53 = - (2,28 - 0,53) = - 1,75$
3) $- \frac{11}{28} * 1 \frac{3}{11} = - \frac{11*14}{28 *11 } = - \frac{1*1}{2*1} = - \frac{1}{2}$
4)$2 \frac{1}{12} : (-1,75) = - \frac{25}{12} : \frac{7}{4} = - \frac{25*4}{12*7} = - \frac{25*1}{3*7} = - \frac{25}{21} = -1 \frac{4}{21}$
5) $- \frac{1}{2} - ( - 1 \frac{4}{21} ) = - \frac{1}{2} + 1 \frac{4}{21} = - \frac{21}{42} + 1 \frac{8}{42} = \frac{50}{42} - \frac{21}{42} = \frac{29}{42}$
Ответ: $\frac{29}{42} .$