Final answer:
To rewrite the value of each expression without using absolute value notation |a|, we consider the cases when a is positive and when a is negative. When a is positive, the expression remains the same. When a is negative, we can replace |a| with -a.
Step-by-step explanation:
To rewrite the value of each expression without using absolute value notation |a|, we need to consider the cases when a is positive and when a is negative.
Case 1: a is positive
In this case, we don't need to change the value of a. So, the expression remains the same.
Case 2: a is negative
When a is negative, we can rewrite the expression as -a. This is because |-a| is equal to -(-a), which is equal to a. So, we can replace |a| with -a when a is negative.