460+342=?,233+473=?,972+736=?
732-67=?,998-623=?,1377-710=?
34+?=895,257+?=762,1238+?=1668
16*7=?,9*74=?,839*5=?
687/3=?,200/8=?,762/6=?
---
?-262=810-406,167+195+405+391=?
770-262=?+353,594+524+304-1237=?
267+?+394=915,1021+594-722-667=?
242+?-523=475,1940-605-563-437=?
放烟花爆竹