Question

Choose the correct answer and Fill in the blanks:

$\left(-1\right)+\_\_\_=\left(+5\right).\left[\left(-6\right)/\left(+6\right)\right]$

Answer 1

If we substitute $-6$ we get

$$\begin{gathered} \left(-1\right)-\left(-6\right) \\ -1+6 \\ =+5 \end{gathered}$$

Hence, $\left(-1\right)-\left(-6\right)=+5$