请展开查看知识点列表
18+20= 42-10= 7+9= 16-8=
77-7= 50+14= 40+8= 35+40-60=
36-6+25= 25+(90-50)=
60+35= 39-9= 12-5= 13-6= 46-8=
63+7= 5+49= 74-60= 60+15-8= 94-30+7=
69-5-20= 43+(16-9)=
进入组卷