Ffocws rhifedd 6 : llyfr ffocws dosbarth /
Ebbutt, Sheila.
Askew, Mike.
Qualifications, Curriculum & Assessment Authority for Wales.
Bodedern : Gwasg Taf,
2003.
Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Rigby, 2000.
Addasiad Cymraeg gan Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru = Welsh adaptation by Qualifications, Curriculum and Assessment Authority for Wales.
Numeracy