二、能力提升

11.

12.374÷

13.

14. ×39.75+ ×46.25+ ×37.2

15.

16.1× ×2× ×3× ×…×2016×

17.2016×2018×

18.

19.2016× × ×…×

20. spHMkismOKUEe1T2NE1xmLcFkZNZjhzV4uAYr8gLx8lBv9OX2kK0bCpeOL86kbCX