负数加减法

-5+9=

9-10=

7-9=

12+（-9）= -2+9=

7-12=

5-91=

14-9=

9-14=

51-60=

60-100= 11-12=

13-13=

24-90=

0-17=

0-100= 100-101= 17-20=

1-7=

0-1=

1-0=

11-9=

-9+6=

-1+9=

-9+8=

-1+1= -3+11=

-9+20=

-7+7=

0+7=

-1-1=

3-9=

-3-9=

-9-10=

-9-6=

-1-100=

-1-99=

-8+30=

-5-5=

-99-1=

-1-99=

-10+10=

-25-25=

25-9=

-1-1-1=

-9-6-6=

5-4-9=

9+8-20=

20-9-1=

25-9-10=

10-9-7=

10+9+5=

-9+9+5=

-9-5+(-2)=

5-9-6=

6-9-1=

15-9-5=

-2-2-2=

-9+10+6=

-3-9+20=

-5+2+9=

19-20+1=

25-26+1=

21+5-30=

7-9-5=

9+5-30=

11-12+9=

25+25-51=

3+6-10=