请展开查看知识点列表
A.7+40 B.80-0 C.40+8 D.20+40
A.28-28 B.3+50 C.80-30 D.40+20
+ =
- =
+=
-=
54+28=
14÷7=
45÷9=
7×3=
8×5=
16÷8=
9×4=
9+3=
37+45=
6×2=
进入组卷