Subtraction of whole numbers with subtractions in parentheses refers to a situation where we perform the mathematical operation of subtraction on the difference of some terms that are in parentheses.

**For example:**

$12 - (3-2) =$

One way to solve this exercise will be to distribute the parentheses. To do this, we must remember that according to the law of signs of addition/ subtraction, **after removing parentheses, the expressions that were inside them change their sign**.

**That is, in our example:**

$12 - (3-2) =$

$12 - 3 + 2 =$

$9 + 2 = 11$

When distributing the parentheses, we will place a $-$ in front of the number $3$ and a $+$ before the $2$.

As you can see, in both cases the sign that was inside the parentheses has switched to the opposite sign.

**Another way to solve this exercise is to use the order of operations, that is to say:**

$12 - (3-2) =$

**We will start by solving the expression in parentheses by using the order of operations and we will get:**

$12 - 1 = 11$