Make people refreshed.

First-class natural dance steps

Fly away in vain, and the silver flowers are everywhere.

A long dragon

Mathematical problems:

1, error. For example, 0 does not hold. I suppose you haven't learned negative numbers? Ha ha. . . )

2. correct. But there is something wrong with your statement. One sixth should be 1/6, and one seventh should be 1/7.

Study hard ~ ~ ~