This makes no sense you are a bad teacher

That's not a question but here's a short summary:

 

6A(16) is 106(10) because 6*(16^1)+A*(16^0) = 6 * 16 + 10 * 1 = 96 + 10 = 106

 

Fancy ABC-formula because I liked to include math and I dont now TeX so I cant put my own formulas in there: