Moving ahead in arithmetic

Manylion Llyfryddiaeth
Prif Awdur:	Merton, Elda L
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York Holt, Rinehart and Winston c1963.
Pynciau:	Arithmetic > Study and teaching. Arithmetic > Problems, exercises, questions. Arithmetic > Juvenile work.