Evaluate 15-1(12÷4+1)

$15 - 1 (12 \div 4 + 1)$

Step 1

Simplify each term.

Divide $12$ by $4$ .

$15 - 1 (3 + 1)$

Add $3$ and $1$ .

$15 - 1 \cdot 4$

Multiply $- 1$ by $4$ .

$15 - 4$

Step 2

Subtract $4$ from $15$ .

$11$