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: $frac{29}{42} .$