438+356=?,205+496=?,421+706=?
702-43=?,973-653=?,941-172=?
58+?=891,230+?=790,355+?=942
74*7=?,88*9=?,394*4=?
368/8=?,935/5=?,918/6=?
---
?-212=880-440,173+113+403+157=?
778-210=?+358,540+380+233-934=?
259+?+354=900,436+477-244-304=?
258+?-508=407,999-263-182-478=?
决战到天亮