Mathemateg pen
Subtitle: ar gyfer oedrannau 9 i 11 : llyfr athrawon
By: Anita Straker ; [addasiad Cymraeg: Trosol Cyf.].
Contributors: Trosol (Organisation); National Language Unit of Wales.; Welsh Joint Education Committee.
Series: Mathemateg pen
Publisher: Uned Iaith Genedlaethol Cymru
Published: 1998
Place of publication: Caerdydd
Language: wel
Number of pages: 78
Subjects: Mathematics -- Study and teaching (Primary); Mental arithmetic -- Problems, exercises, etc.; Teaching -- Aids and devices.
Work titles: Mental maths for ages 9 to 11, teacher's book.
Notes: Arg. Saesneg gwreiddiol = Original English ed.: Cambridge: Cambridge University Press, 1994.

Addasiad Cymraeg gan = Welsh adaptation by: Trosol Cyf.

Addasiad Cymraeg o = Welsh adaptation of: Mental maths for ages 9 to 11, teacher's book.