基本信息出版社：CARTWHEEL BOOKS
页码：14 页
出版日期：2006年07月
ISBN：0439856736
条形码：9780439856737
装帧：木板书
正文语种：英语
外文书名：厚纸板数学游戏书

内容简介 They're busy and they're zippy They're happy, bright, and dippy. They're friends who play and laugh all day-- Why are these dinos dizzy? This sturdy board book has a plastic carrying handle and colorful dinosaur-shaped beads on a built-in abacus. As the bouncy rhyming story progresses, kids can move the dinos one at a time along the abacus. This book introduces the concept of addition, spread by spread. The final spread introduces subtraction as the dinos move back to their starting points.