Piskel

Today I used piskel here is my work.

I would like feedback on what I can improve on.

Compatible Numbers

My goal is learning how to use compatible numbers.

154 + 139 + 246 = ?
154 + 139 + 246 = ?
154 + 246 = 400
400 + 139 = 539

=539

Family Tree

Our task was to make a family tree of our close relatives.
I would like to know how much you liked this slide from a scale to one to ten and what I can improve on.