To get an internal sense of how numbers relate to each other, students can practice working with number lines.

There are different methods for addition and subtraction. You may have used column ... Defenders of Mathematica to get ready for SATs. In this game, use the times tables and more maths skills ...

There are lots of different tools that help you to do mental addition and subtraction. Remember, it doesn't have to be done entirely in your head, you can still use a pencil and paper to help.