Question

614. Выполните действия.

1) (1/3-5/8)×(-6/7)

2) (-5/12-7/30)÷13/15

3) -3/4-1/6)÷(1 3/8)

4)(1/4-5/18)×36​

Answer 1

Ответ:

$(\frac{1}{3}-\frac{5}{8} ) * (-\frac{6}{7} )=-\frac{7}{24} * (-\frac{6}{7} ) = \frac{1}{4} =0,25$

$(-\frac{5}{12}-\frac{7}{30} ) / \frac{13}{15} =-\frac{13}{20} * \frac{15}{13} = -\frac{1}{4} * 3 =-\frac{3}{4}=-0,75$

$(-\frac{3}{4}-\frac{1}{6} )/(1\frac{3}{8} )=-\frac{11}{12} /\frac{11}{8} =-\frac{11}{12} *\frac{8}{11} =-\frac{1}{3} *2=-\frac{2}{3}$

$(\frac{1}{4} -\frac{5}{18} )*36=-\frac{1}{36} *36 = -1$