Awdur(on)/Author(s) : Gwasg Addysgol Drake/Educational
Set o gardiau i gynorthwyo plant i archwilio sgwar 100. Mae cyfran o'r sgwar yn cael ei ddangos ac mae'n rhaid i'r plentyn ddod o hyd i'r rhif coll.
A set of cards designed to help children to explore the 100 square. A segment of the 100 square is shown and children have to find the missing number.