Addition and subtraction a cognitive perspective

Bibliografiske detaljer
Andre forfattere:	Carpenter, Thomas P, eds, Moser, James M., eds, Romberg, Thomas A., eds
Format:	Bog
Sprog:	English
Udgivet:	Hillsdale, NJ Lawrence Earlbaum Associates c1982.
Fag:	Addition. Subtraction. Mathematical ability > Testing.