Includes 30 illustrated cards that help children recognize numbers and learn basic number skills and mathematical vocabulary. This title contains cards for 0 to 20, 30, 40, 50 and 100 as well as the mathematical symbols +, - and =. It also includes suggestions for how to use the cards. Это и многое другое вы найдете в книге Usborne Very First 1, 2, 3 (набор из 30 карточек) (Felicity Brooks)