P04 escalier

The notes for this video have not been written yet. In the meantime, here is a simple method to work through it.

Four steps to work through this video

1. I watch. Watch the video once all the way through, without taking notes: it lasts 1 min.
2. I try. Watch it a second time, pencil in hand: pause the video before each answer and work it out yourself.
3. I test myself. With your notebook closed, explain the main idea out loud, then do the exercises on BEFREE Academy.
4. I move on. You have reached the end of the series Maths. Come back in a few days to check what you remember.