Tal

Decimaltal, brøker og procent

https://www.youtube.com/watch?v=mSrpbqlVaws

Brøk til decimaltal

https://www.youtube.com/watch?v=RhTbZXZbi-A

Rødder og potenser

https://www.youtube.com/watch?v=uIKW9wUBOF8

https://www.youtube.com/watch?v=Hi64JAmG3ec

kvadratrod

https://www.youtube.com/watch?v=5ZM1ckFTa04

Kvadratrod

https://www.youtube.com/watch?v=B4zejSI8zho&ab_channel=mathantics

Kvadratrod

https://www.youtube.com/watch?v=yICR9PiW340&ab_channel=MathwithMr.J

Kvadratrødder regneregler

https://www.youtube.com/watch?v=-GDxS0ZpFQM&ab_channel=simonsonic

Potens, kvadrattal, kvadratrod

https://www.youtube.com/watch?v=Hi64JAmG3ec&t=96s&ab_channel=MetteKellerLarsen