Question

Solve using absolute values.

$\_\_\_\_\_+(+43)=56$

Answer 1

Let the missing number be $x$, then,

$$\begin{gathered} \_\_\_\_+(+43)=56 \\ \Rightarrow x+43=56 \\ \Rightarrow x=56-43 \\ \Rightarrow x=13 \end{gathered}$$

Hence, the missing number is $13$.