小学一年级加减混合口算练习题(3)
奥数网
2016-08-02 14:45:33
53+(50-50)=
35+8-6=
39-(14-5)=
8+(50-6)=
20-(1+6)=
53+(50-50)=
35+8-6=
39-(14-5)=
8+(50-6)=
20-(1+6)=