9×9%= ×60%= 125%÷25%= 0.2×0.3=
5π= 0.53= 0.062= 12.56÷3.14=
0.1÷0.01= = = 32×2=
= 2+98%= 3.14× =
解:设母鸡有x只,那么可列方程
□○□=□(元)