june 22

1. We'll cut squares - and more generally, rectangles, on the graph paper into 1x2 'domino's. 2x2 is easy. 2x3 too, and 4x4. Can one cut 3x3? What about 4x4 with 2 opposite corners removed?
2. More practice of finding remainders: when dividing by 2, by 3, by 4...
3. Back to graph paper: we'll be finding areas of various squares...
4. ...and adding vectors. This time, also trying to solve (1,2)+(x,y)=(3,4), or suchlike.

experiment: capillary forces, again, or perhaps, microwaving empty plastic bags...