Question

Choose the correct answer and Fill in the blanks:

$\left(-72\right)-\left(-90\right)=\_\_\_\_\_.\left[\left(+18\right)/\left(-162\right)\right]$

Answer 1

Consider

$$\begin{gathered} \left(-72\right)-\left(-90\right) \\ -72+90 \\ =+18 \end{gathered}$$

Hence, $\left(-72\right)-\left(-90\right)=+18$