Evaluate each absolute value expression below.

1. $| 2 | + | 4 |$ 

   Hint (a):

   Since $2$ and $4$ are already positive, just add.

2. $| - 3 | + | 5 |$ 

   Hint (b):

   How far is $-3$ from $0$?

   Step 1 (b):

   $\left|−3\right| = 3$

   Step 2 (b):

   $\left|5\right| =5$

   Step 3 (b):

   $3 + 5 = 8$

3. $| - 7 | + | - 1 |$ 

4. $- | 6 |$ 

   Answer (d):

   $−6$