Subtraction is when you take away a number or an amount from another number or amount to work out what is left. There are different things you can use to help you subtract. You can use number lines, ...

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 ...

You may hear your child and her teacher talk about Place Value Disks. When learning place value, addition, and subtraction, place value disks are a great tool to tie together your child’s ...