题目内容
A.正确 B.错误
试题答案
12-5=
[ ]
A.7
B.8
C.9
12-7=
A.5
B.6
D.14
16-7=
B.9
C.15
14-6=
C.7
D.8
18-9=
A.3
B.5
D.15
15-8=
7+8=
A.4
B.4
D.17