1. (2019一上·商丘月考) 看谁算得都对。

2+3=          4+3=          9-6=          10-8=

7-4=          11+2=          15-3=          8-4=

15+3=          9-4=          10-5=          18-6=

3+3=          10-9=          17+2=          2+2=