Question

Помогите решить примеры:
- 2/7 ∙ ( - 2/3)
- 7/11 ∙ 2/3
1/3 : ( - 2/5)
- 3/7 : ( - 1/2 )
- 1/12 : ( - 1/12)
0,63 : (-1)

Answer 1

Ответ:

4/21

-14/33

-5/6

6/7

1

-0.63

Answer 2

$-\frac{2}{7} *(-\frac{2}{3} )=\frac{2*2}{7*3} = \frac{4}{21}$

$-\frac{7}{11} * \frac{2}{3} =-\frac{7*2}{11*3} = -\frac{14}{33}$

$\frac{1}{3} : (-\frac{2}{5} )=-\frac{1*5}{3*2} = -\frac{5}{6}$

$-\frac{3}{7}:(-\frac{1}{2})=\frac{3*2}{7*1} = \frac{6}{7}$

$-\frac{1}{12}:(-\frac{1}{12} )=\frac{1*12}{12*1} =\frac{12}{12} =1$

$0.63:(-1)=-0.63$