#6 Multiplying Letters: A Funny Story About Algebra (Funny Math Stories) (Volume 3) by S.E. Burr
Description of the book:
“Lester lost his marbles! That maniac is multiplying letters!” Lester’s friends are concerned when he starts putting letters where they don’t belong–in math problems! Is Lester talking in a strange new code, or are his marbles really missing? It can be confusing for kids when math starts incorporating letters. This book teaches beginning algebra concepts in a fun and funny way. Also available in paperback.