If I remember little else from my undergrad math degree, I have thereafter always written my sevens with crossbars. This turned out to be handy in Europe, where way too many people are writing their ones with two strokes.
Cursive handwriting is being lost in many countries, which is a pity IMHO.
I am from Italy, moved to Sweden a few years ago and I was shocked to learn that my daughter is not being taught cursive at school.
Does anybody write "a"? I certainly don't, I can't even really guess what would be the correct hand movement to easily include the tail. Do a reversed s then up down?
My 4 is not listed. I start at the top, go diagonally down left, do a almost horizontal bar right, and then vertically down. Looks almost like a lightning.