205+590=?,297+598=?,436+605=?
783-31=?,825-238=?,868-341=?
37+?=802,208+?=806,387+?=926
36*6=?,43*5=?,88*3=?
21/?=?,45/5=?,84/6=?
---
?-279=707-473,197+245+367+110=?
887-257=?+345,341+187+252-615=?
297+?+397=995,468+237-147-315=?
265+?-414=256,999-320-122-365=?
奏国歌升旗