Question

(1,42-(3,22)):(-0,8)+(-6)•(-0,7)=

Answer 1

(1,42-(3,22)):(-0,8)+(-6)•(-0,7)

$- 1.8 \div ( - \frac{4}{5}) + 4.2$

$- \frac{9}{5} \div ( - \frac{4}{5}) + \frac{21}{5}$

$\frac{9}{5} \times \frac{5}{4} + \frac{21}{5}$

$9 \times \frac{1}{4} + \frac{21}{5}$

$\frac{9}{4} + \frac{21}{5}$

Ответ:

$\frac{129}{20}$