Rachel
About
Khan Academy on a Stick
Comparando relaciones proporcionales
Relaciones proporcionales y tasas de cambio
Problema de velocidad con fracciones 1
Costo unitario con fracciones 1
Comparando relaciones proporcionales
Construyendo una ecuación para una relación proporcional
Your browser does not support video. Please get the latest version of Google Chrome, Firefox, IE, or Safari. Alternately, you can try the link below if you have VLC or another media player installed.
If the above player doesn't work, you can
try this direct link
.