1. 看谁算的快.

9-2-3=               8+0-4=               5+3-5=

6+2-3=               9-4+1=               8-8+2=

7-3-2=               9-0-3=                8-5-3=

3+6-4=              4+5-6=                2+6+1=

8-0-3=               9-7+2=               8-3+3=