An interesting video to understand Scientific Notation.
You can download this file to understand Scientific Notation.
Here you are the information you need about nth-ROOTS.
Another interesting point that we are going to study is "INTERVALS", Here you are the information you need to know and some exercises to do.
We have almost finished the unit. You should be able to classify numbers in the most accuate set. So, try these exercises to check your knowledge. Good luck!