Hi Flicka,Errare humanum est!
So don't worry, your DS is unfortunately not the only one to do silly mistakes!
I remember a poster who said last year that she used this method to try to diminish them:
she encouraged her DS to check for silly mistakes in his maths papers by offering him £1 a paper for no silly mistake and 20p off for each one...
Maybe that could work for your DS if you use a similar approach?
JaneEyreAvec le temps et la patience, la feuille du mûrier devient de la soie.Proverbe chinoisLa patience est amère, mais son fruit est doux.Proverbe français