Answer:
Expression
16 - 12 / 4
2 + 6 / 2
8 + 4*2
8+4 * 2
12/2 - 3
6/8 + 2
Value
13
5
16
16
3
2
The last result is correct. First 6/8 is done using integer division, 
 resulting in 0. Then that 0 is added to 2.

Evaluation by Rewriting

When evaluating an expression, it can be helpful to do it one step at a time and to rewrite the expression after each step. Look at:

16 - 12 / 4

Do the division first, since it has highest precedence. Next, rewrite the expression replacing the division with its value:

16 - 3

Now evaluate the resulting expression:

13

You can write the process like this:

16 - 12 / 4
     ------
16 -    3
---------
   13

The dashed lines show what was done at each step.

Question 23:
What is the value of the following expression?
24 / 2  - 8