The expression $|-21| + |5|$ involves finding the absolute values of the numbers and then adding them together.

1. The absolute value of $-21$ is $21$, because the absolute value removes the negative sign.
2. The absolute value of $5$ is $5$, since it's already positive.

Now, add these two values together:

$21 + 5 = 26$

So, $|-21| + |5| = 26$.

Would you like further details or have any questions?

Here are 5 related questions:

1. What is the absolute value of $-45$?
2. How do you simplify $|3| + |8|$?
3. What is the result of $|-10| + |-5|$?
4. Can you find the absolute value of a decimal like $|-7.8|$?
5. How does the absolute value function behave for zero $|0|$?

Tip: Absolute value represents the distance of a number from zero on the number line, always resulting in a non-negative number.