□○□=□( )
24 30 76 80 50 46
96 10 62 40 80 60
够不够(在合适的里画“√”)
□-□=□ □-□=□
37-6= 92-9= 78-70= 98-50=
80-880 90+49+90 9+720
○○
☆☆☆