Absolute value

3 videos
2 skills
Find the distance between any two numbers using absolute value.

Absolute value as distance between numbers

VIDEO 5:30 minutes
In this video, we think about what |a-b| really means, and we verify that |a-b| = |b-a| by looking at an example.

Absolute value to find distance

PRACTICE PROBLEMS
Practice taking the absolute value of the difference of two numbers to find the distance between those numbers. Apply this principle to solve word problems.

Interpreting absolute value as distance

VIDEO 10:54 minutes
In this video, we work through a bunch of examples that stretch our thinking on absolute value.

Absolute value to find distance 2

PRACTICE PROBLEMS
Solve conceptually challenging absolute value problems. In order succeed at these problems, you'll need to remember that the absolute value of the difference of two numbers is the distance between those numbers.

Justification for |a - b| = |b - a|

VIDEO 5:30 minutes
This is a more formal justification for why |a - b| = |b - a| than we saw in previous videos.