Question

Resolva a expressão ​

Answer 1

Oie, tudo bom?

$= - \frac{3}{10} + [ - \frac{15}{4} + \frac{7}{4} ] \\ = - \frac{3}{10} + [ \frac{ - 15 + 7}{4} ] \\ = - \frac{3}{10} + [ \frac{ - 8}{4} ] \\ = - \frac{3}{10} + [ - 2] \\ = - \frac{3}{10} - 2 \\ = - \frac{3 + 20}{10} \\ = - \frac{23}{10} \\ \boxed{ = - 2,3}$

Att. NLE Top Shotta