Number sentences : linking addition and subtraction word problems and symbols
Carey, Deborah A.
Number sentences : linking addition and subtraction word problems and symbols - 266-280 - 1991 22, no. may. = JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION
ARITMETICA DESARROLLO COGNOSCITIVO PROCESOS COGNITIVOS RESOLUCION DE PROBLEMAS
Number sentences : linking addition and subtraction word problems and symbols - 266-280 - 1991 22, no. may. = JOURNAL FOR RESEARCH IN MATHEMATICS EDUCATION
ARITMETICA DESARROLLO COGNOSCITIVO PROCESOS COGNITIVOS RESOLUCION DE PROBLEMAS