Números enteros

https://www.youtube.com/watch?v=2AFZpUbGulk&t=136s
https://www.youtube.com/watch?v=MsVfXEtD9Cw

https://www.youtube.com/watch?v=tNxHToZ-LbE

https://www.youtube.com/watch?v=qDsDM0oq-hw

https://www.youtube.com/watch?v=SRPkdB0vJzU&t=259s

https://www.youtube.com/watch?v=RxX-JhmxLG4

https://www.youtube.com/watch?v=9xCbQMdQ2S4

https://www.youtube.com/watch?v=lTpbx63UK6M&list=PLeySRPnY35dF1DoKO_5VyboxzdT4UyyPA&index=2

https://www.youtube.com/watch?v=g25yIlEEwrs

Tipos de variables estadísticas.

Conceptos básicos de estadística

https://www.youtube.com/watch?v=Xq3thcQqwbc&list=PLeySRPnY35dFF5D9g_zi07yPKGXui4GII

Tipos de variables

https://www.youtube.com/watch?v=_Nud5vrAjf4&t=59s
https://www.youtube.com/watch?v=nCszHELuwxk

https://www.youtube.com/watch?v=sQ08tqf-rXU

Como construir ángulos.

https://www.youtube.com/watch?v=O83DKSYffp0

https://www.youtube.com/watch?v=vavjBkuHoIA&t=395s

Medir ángulos

https://www.youtube.com/watch?v=abn-4A0gjqA

https://www.youtube.com/watch?v=GqWn9NpC-4c

Construir ángulos con transportador y regla.