1 开平方
已知面积900，已知长宽比2：3，问具体长宽
2X * 3X=900, 即6*X的平方=900
即900/6后开平方=求150的开平方结果
使用方法：
1 输入150，按桔红色键+“-”即开平方键，显示12.25即结果
12.25*12.25=150.06约等于150平方米
即宽为24.5米，长为36.75，面积为900.375
2 开立方
You can compute the cubic root of 27 using the following keystrokes:
27
orange shift y^x (multiply key)
3
orange shift 1/x (divide key)
=
You can also use the x√y (x root of y) key of the math set of keys. Touch the following keys:
blue shift math (minus key)
27
x√y
3
=
注意进入MATH专项界面后，
The y^x function appears 2 places on the math set of keys. The one under the multiply key does not work, the one under the x root y (row2, column 4) does. 程序BUG,The next release will fix the problem