就是自己根据教程学习打的代码，一个完整的计算器，可以进行简单的数学运算，-According to learn to play the tutorial is their code, a complete calculator can perform simple math,

基于android的速算训练系统，能进行简单的小学数学运算，包含游戏学习等(Quick training system based on android,Able to perform simple elementary math operations, including game learning, etc.)