TY - BOOK AU - Arthur Benjamin ; illustrations by Natalya St. Clair. TI - The magic of math: solving for x and figuring SN - 978-0-465-09621-3 AV - QA 111 B468 2015 PY - 2015/// CY - New York PB - Basic Books, a member of the Perseus Books Group KW - Mental arithmetic KW - study and teaching KW - Mathematics ER -