1. Negative number

2. Integer: +2 -7-13 0 score:-16 95% positive rational number: +2 3. 14 95%.

3.( 1) four and one third (2) minus three thirds

4.a is less than or equal to 0

5. plus or minus 1 plus or minus 2

6.3.5 to the left

7.2a 2b

8.( 1)6 (2) plus or minus 6

9.A

10.B

1 1.B

12.B

13.( 1)6 (2) Two fifths

15.( 1)a & lt； b & ltd & ltc

I don't want to fight the rest, so fight by yourself. Mine is not necessarily right. I made it myself. . . . . .