Hot Dots® Place Value Math Cards 100 Place value problems! Practice place values with this set of 50 double-sided cards designed to help students practice 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 practice place value. Grades 1+/Ages 6+ The nitty-gritty: · 50 Double-sided, fully illustrated cards (3.5" x 5") · 100 Place value problems · For use with Hot Dots® pen