## Construct and Critique Arguments

## Opening

# Construct and Critique Arguments

The *absolute value of a number* is the distance a number is from 0 on a number line. The symbol |*a*| is used to indicate the absolute value of *a*.

Watch the video.

- What did Carlos think absolute value was at the beginning of the video?
- What did Jan suggest doing to help them think about absolute value?
- What argument did Carlos use to say that the absolute value of 12 cannot be –12?
- What model did Jan and Carlos use to help them understand absolute value?
- What would Carlos have said the absolute value of 8 is at the beginning of the video? What would Carlos have said the absolute value of 8 is at the end of the video?