Question

Simplify each of the following:
$25-\frac{1}{2}\left\{5+4-(3+2-\overline{1+3})\right\}$

Answer 1

On applying the BODMAS rule, we get:

​25 $-$ 1/2 {5+4-( 3 + 2 − $\overline{1+3}$ )}
$$\begin{gathered} =25-\frac{1}{2}\{9-(3+2-4\left)\right\}[\mathrm{Removing}\mathrm{vinculum}] \\ =25-\frac{1}{2}\{9-(5-4\left)\right\}[\mathrm{Performing}\mathrm{addition}] \\ =25-\frac{1}{2}\left\{8\right\}[\mathrm{Performing}\mathrm{subtraction}] \\ =25-4 \\ =21 \end{gathered}$$