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 ...

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 ...

The goats and their friends are having a party, but they need your help to reach the piñata. As a team, use your knowledge of thousands, hundreds, tens and ones place values to help the goats release ...