Question

1)-3/4 × (-5) : 5/2
2)-7 8/9 - 10 1/6 + 5/18
ПОМОГИТЕ СРОЧНО!!!!!!!!!!!​

Answer 1

Ответ:

1)-3/4 × (-5) : 5/2

$-\frac{3}{4}* (-5) :\frac{5}{2}=\frac{3}{4}* 5 *\frac{2}{5}= \frac{3}{4}* 2=\frac{6}{4}=\frac{3}{2}=1\frac{1}{2}$     или  $1,5$

2)-7 8/9 - 10 1/6 + 5/18

$-7\frac{8}{9}-10\frac{1}{6} +\frac{5}{18} =-\frac{9*7+8}{9} -\frac{6*10+1}{6} +\frac{5}{18} =-\frac{71}{9} -\frac{61}{6} +\frac{5}{18} =\frac{-71*2+(-61)*3+5}{18} =\\\\=\frac{-142-183+5}{18} =\frac{-320}{18} =-\frac{320}{18} =-\frac{160}{9} =-17\frac{7}{9}$