Chapter 4.1, Problem 71CCR

To determine

Find sum or difference.

Answer to Problem 71CCR

The required answer is $-9-\left(-9\right)=0$ .

Explanation of Solution

Given information: Given the number is $-9-\left(-9\right)$

Calculation:

  $-9-\left(-9\right)$

Subtract a negative number is equivalent to add a positive number.

  $\begin{array}{l}=-9+9\\ =0\end{array}$

Thus, the required answer is $-9-\left(-9\right)=0$ .