Evaluate 4-2pi+1/2

$4 - 2 π + \frac{1}{2}$

Find the common denominator.

Write $4$ as a fraction with denominator $1$ .

$\frac{4}{1} - 2 π + \frac{1}{2}$

Multiply $\frac{4}{1}$ by $\frac{2}{2}$ .

$\frac{4}{1} \cdot \frac{2}{2} - 2 π + \frac{1}{2}$

Multiply $\frac{4}{1}$ by $\frac{2}{2}$ .

$\frac{4 \cdot 2}{2} - 2 π + \frac{1}{2}$

Write $- 2 π$ as a fraction with denominator $1$ .

$\frac{4 \cdot 2}{2} + \frac{- 2 π}{1} + \frac{1}{2}$

Multiply $\frac{- 2 π}{1}$ by $\frac{2}{2}$ .

$\frac{4 \cdot 2}{2} + \frac{- 2 π}{1} \cdot \frac{2}{2} + \frac{1}{2}$

Multiply $\frac{- 2 π}{1}$ by $\frac{2}{2}$ .

$\frac{4 \cdot 2}{2} + \frac{- 2 π \cdot 2}{2} + \frac{1}{2}$

Combine the numerators over the common denominator.

$\frac{4 \cdot 2 - 2 π \cdot 2 + 1}{2}$

Simplify each term.

Multiply $4$ by $2$ .

$\frac{8 - 2 π \cdot 2 + 1}{2}$

Multiply $2$ by $- 2$ .

$\frac{8 - 4 π + 1}{2}$

Add $8$ and $1$ .

$\frac{9 - 4 π}{2}$

The result can be shown in multiple forms.

Exact Form:

$\frac{9 - 4 π}{2}$

Decimal Form:

$- 1.78318530 \dots$