Question

7 целые 4/9 - 8 целые 5/18​

Answer 1

Ответ:

$\frac{67}{9 } - \frac{149}{18} = - \frac{5}{6}$

Answer 2

$7\frac{4}{9}-8\frac{5}{18}=7\frac{4*2}{9*2}-8\frac{5}{18}= 7\frac{8}{18}-8\frac{5}{18}=(7-8)+(\frac{8}{18}-\frac{5}{18})=\\\\=-1+\frac{3}{18}=-\frac{15}{18}=-\frac{5}{6}$