Students put all their addition and subtraction skills together to solve equations.

Match fun story problems with the correct addition or subtraction expression.

We may see addition or subtraction as simple, but it requires different parts of our brain to store information and understand order.

The present paper describes the success, the methods (mental, informal written, standard algorithm) and the strategies of informal written arithmetic to be observed when 300 elementary students worked ...

The new theme is Addition and Subtraction, stories of humans becoming more and less and sometimes both with the help of technology.

This study examined Korean second and third graders' understanding of multidigit addition and subtraction and particularly their ability to explain the trading required when a column sum of the ...