一、双基训练

1.2017×

2.0.75÷

3.

4.（3-1.4 ）×

5.3-

6. ×39+ ×27

7. -0.25

8.5- ×21

9.

10. Nu8WssIf7r8++Hy292nE03UDdAKXd+UnbfHW73tr1ONXGatCrjVZKpZKGJ6Laz01