本系统可以用来进行单独的的加、减、乘、除心算练习，也可综合心算的速度与正确率进行测试。当用户在进行简单的四则运算时运算速度和正确率都较高时，可以进入四则混合运算，借此来进一步提高自己的心算能力。-The system can be used to separate the addition, subtraction, multiplication, and division practice mental arithmetic, mental arithmetic can also be integrated to test speed and accuracy. When the user doing simple arithmetic calculation speed and accuracy when you are high, you can enter the four hybrid operation, thereby to further improve their mental arithmetic skills.