它适用于学前和小学阶段的儿童进行计算锻炼，本程序可以进行难度、题型、时间设置。并能实现自动出题，批题，也可以将试题按设置要求自动输出-It is suitable for pre-school and primary school children in the calculation exercise, the program can be difficult, questions of the time settings. And can automatically a problem, g