100 Place value problems! Practise place values with this set of 50 double-sided cards designed to help students practise representing values; ordering numbers; reading and writing numbers; ordinal, even, and odd numbers; counting; comparing numbers; rounding; and computation and money.Use with the Hot Dots pen for a fun and interactive way to practise place value.Grades 1+/Ages 6+ The nitty-gritty:.50 Double-sided, fully illustrated cards (8.9cm x 13cm ).100 Place value problems.For use with Hot Dots pen