ISBN: 9787555272427 - 幼小衔接练习册数字分解与组成凑十法借十法10以内加减法运算20以内算术题学前数学口算速算幼儿园教材5-6-7岁儿童启蒙学算术书籍 (1 Ergebnisse)

Decomposition and composition of young cohesive exercises within 5/10/20 preschool kindergarten. middle and large classes. and elementary school mathematics arithmetic oral arithmetic exercise test enlightenment training oral arithmetic mental arithmetic guidance(Chinese Edition)