Significant Figures & Conversions

Today we learned about lots of things, including all about significant figures and the units of measurement in the metric system. I think it's pretty straight forward, but a lot of it is contradicting to things like rounding rules that we've been used to.

Below is a video that I found very helpful when I was kind of confused:
https://www.youtube.com/watch?v=6oj4y0d44nQ

Also, here are a couple pictures of the notes from today!