Quiz: Subtraction with up to 4-digit numbers Complete this quiz to understand how to subtract with up to four-digit numbers. Then put your knowledge to the test.

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 ...

Learn activities for second grade math to prepare for school. Teach your children 2nd grade math skills like addition and subtraction.