A is for Addition, B is for Base, C is for Chord
From addition to zero, The ABCs of Mathematics is a colorfully fun, yet simple introduction for poshinate babies--and grownups--to a new math concept for every letter of the alphabet. Each page in this mathematical primer (written by experts) features progressive levels of text so the book grows along with your little mathematician.
Also in the Baby University Series:
ABCs of Science
ABCs of Biology
Board Book 26 pages