一年级口算题：20以内进位退位加减

一年级上册口算题大全：20以内进位退位加减综合！

10-2=               9+7=            6+8=               5+9=

12-4=               7+9=            20-2=              11-2=

20-3=               9+8=            18-9=              20-9=

12-7=               10-8=           17-8=              9+2=

8+3=                6+8=            9+2=               6+9=