Fuson, Karen C. <br/><br/>
Korean children's single digit addition and subtraction : numbers structured by ten 

 - 148-165 
 - 1992 23, no. 2 
 = JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION 
<br/><br/><label>Encabezamiento--Término de Indización: </label>ADICION DESTREZAS MATEMATICAS RESOLUCION DE PROBLEMAS RESTA SISTEMA NUMERICO