Ffocws rhifedd 4 : problem yr wythnos /
Spooner, John.
Askew, Mike.
Ebbutt, Sheila.
Qualifications, Curriculum & Assessment Authority for Wales.
Rhydychen : Rigby,
2002.
Argraffiad Saesneg gwreiddiol = Original English edition : Oxford : Rigby, 1999.
Addasiad Cymraeg gan Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru = Welsh adaptation by Qualifications, Curriculum and Assessment Authority for Wales.
Numeracy