417+398=?,254+491=?,904+731=?
777-57=?,949-665=?,1349-715=?
32+?=822,228+?=779,1245+?=1671
92*7=?,9*137=?,874*5=?
423/3=?,960/8=?,1338/6=?
---
?-279=829-497,144+143+447+366=?
727-281=?+380,522+547+307-1257=?
270+?+303=962,1061+500-702-675=?
218+?-512=479,1939-619-580-409=?
麦当劳薯条