Mathemateg pen
Subtitle: Llyfr cychwynnol
By: Anita Straker ; [addasiad Cymraeg gan gwmni Cymen Cyf.].
Contributors: Cymen; Welsh Joint Education Committee. National Language Unit of Wales
Publisher: Uned Iaith Genedlaethol Cymru CBAC
Published: 1999
Place of publication: Caerdydd
Language: wel
Number of pages: 31
ISBN-13: 9781860854286
Subjects: Mathematics; Study and teaching (Primary); Mental arithmetic; Problems, exercises; Juvenile literature
Work titles: Mental maths. Starter book
Notes: Argraffiad Saesneg gwreiddiol = Original English edition: Cambridge : Cambridge University Press, 1996.

Addasiad Cymraeg gan = Welsh adaptation by: Cymen Cyf.

Addasiad Cymraeg o = Welsh adaptation of : Mental maths starter book.