Fíorais uimhris : suimiú agus dealú /
Gavin, Florence.
Ó Fathaigh, Micheál.
Foras na Gaeilge.
Baile Átha Cliath : An Gúm,
2004.
Translation of: Number facts : addition and subtraction.
Originally published [in English] : Mulberry Publications, 1999.
Mathematics