Solution

154528

First name
Robbie Vart
School
middleton tyas c of e primary
Country
Age
10
Email address
robbie.vart@gmail.com

I find that they are all useful. The one that I understand the most is the column multiplication because that is how I do it in my head. I find it helpful being able to do the addition at the same time as doing it which you can't do in any of the other methods. I find the multiplying with lines the hardest because I don't know where to put the lines.