$\"\"$

Bobby baked $\"\"$ dozen chocolate chip cookies, $\"\"$ dozen sugar cookies and a dozen oatmeal raisin cookies.

one dozen of cookies is equal to $\"\"$ cookies.

Find total cookies did he bake.

$\"\"$ (Distributive property: $\"\"$

$\"\"$ (Add inside terms)

$\"\"$ (Multiply)

Therefore, Bobby baked $\"\"$ cookies.

$\"\"$

Bobby baked $\"\"$ cookies.