Question

((-1,6)²×55-17)÷(-0,4)​

Answer 1

$\frac{( - 1.6)^{2} \times 55 - 17 }{ - 0.4} = \frac{2.56 \times 55 - 17}{ - 0.4} = - \frac{140.8 - 17}{0.4} = - \frac{1408 - 170}{4} = - \frac{1238}{4} = - \frac{619}{2} = - 309.5$