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Roedd llyfr o’r enw ‘Mental Maths’. Teitl y fersiwn Gymraeg oedd ‘Mathemateg Pen’ Deb From: Discussion of Welsh language technical terminology and vocabulary [mailto:[log in to unmask]] Ar ran/On Behalf Of MELANIE DAVIES Sent: 02 July 2015 14:59 To: [log in to unmask] Subject: Re: mental / mentally Defnyddio'r pen a dulliau ar bapur/ysgrifenedig? On Thursday, 2 July 2015, 14:57, Sioned Graham-Cameron <[log in to unmask]> wrote: Fi eto. Cael diwrnod arbennig o dwp heddiw. Mental arithmetic = rhifyddeg pen felly sut mae dweud: "mentally solve problems" - datrys yn y pen / yn feddyliol?? "using mental and written methods" - dulliau meddyliol / pen? Diolch o galon am unrhyw help. Sioned