226+355=?,142+435=?,348+742=?
650-12=?,950-587=?,965-252=?
28+?=664,591+?=726,239+?=993
48*5=?,93*4=?,181*5=?
82/2=?,356/4=?,864/6=?
---
?-266=848-440,173+115+491+168=?
735-249=?+302,569+347+255-926=?
287+?+396=978,428+242-121-370=?
270+?-448=311,999-397-185-332=?
经常流鼻血