1. Fill in the blank: (17 points)

1÷5 means that the product of two factors is (), and one of the factors is (), so find ().

The label of a sweater says "85% wool", which means that () accounts for 85% of ().

3、÷( )=( )× 1=( ) 4、×( )= 1

5.Pi represents the multiple relationship between () and (), which is represented by the letter ().

6. In the same circle, the radius is the diameter (), and they all have ().

7. The percentage of interest and principal is called ().

8. fill in >,