Evaluate 1-(-8)-12/-3

$1 - (- 8) - \frac{12}{- 3}$

Find the common denominator.

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

$\frac{1}{1} - (- 8) - \frac{12}{- 3}$

Multiply $\frac{1}{1}$ by $\frac{3}{3}$ .

$\frac{1}{1} \cdot \frac{3}{3} - (- 8) - \frac{12}{- 3}$

Multiply $\frac{1}{1}$ by $\frac{3}{3}$ .

$\frac{3}{3} - (- 8) - \frac{12}{- 3}$

Write $- (- 8)$ as a fraction with denominator $1$ .

$\frac{3}{3} + \frac{- (- 8)}{1} - \frac{12}{- 3}$

Multiply $\frac{- (- 8)}{1}$ by $\frac{3}{3}$ .

$\frac{3}{3} + \frac{- (- 8)}{1} \cdot \frac{3}{3} - \frac{12}{- 3}$

Multiply $\frac{- (- 8)}{1}$ by $\frac{3}{3}$ .

$\frac{3}{3} + \frac{- (- 8) \cdot 3}{3} - \frac{12}{- 3}$

Multiply $\frac{12}{- 3}$ by $\frac{- 1}{- 1}$ .

$\frac{3}{3} + \frac{- (- 8) \cdot 3}{3} - (\frac{12}{- 3} \cdot \frac{- 1}{- 1})$

Multiply $\frac{12}{- 3}$ by $\frac{- 1}{- 1}$ .

$\frac{3}{3} + \frac{- (- 8) \cdot 3}{3} - \frac{12 \cdot - 1}{- 3 \cdot - 1}$

Multiply $- 3$ by $- 1$ .

$\frac{3}{3} + \frac{- (- 8) \cdot 3}{3} - \frac{12 \cdot - 1}{3}$

Combine the numerators over the common denominator.

$\frac{3 - (- 8) \cdot 3 - 12 \cdot - 1}{3}$

Simplify each term.

Multiply $- 1$ by $- 8$ .

$\frac{3 + 8 \cdot 3 - 12 \cdot - 1}{3}$

Multiply $8$ by $3$ .

$\frac{3 + 24 - 12 \cdot - 1}{3}$

Multiply $- 12$ by $- 1$ .

$\frac{3 + 24 + 12}{3}$

Simplify the expression.

Add $3$ and $24$ .

$\frac{27 + 12}{3}$

Add $27$ and $12$ .

$\frac{39}{3}$

Divide $39$ by $3$ .

$13$