Evaluate: -12.4+9.2+1

Expression: $-12.4+9.2+1$

Add the numbers

$-12.4+10.2$

Calculate the sum

$\begin{align*}&-2.2 \\&\begin{array} { l }-\frac{ 11 }{ 5 },& -2 \frac{ 1 }{ 5 }\end{array}\end{align*}$