31+?=125,28+?=103,69+?=187
?-62=89,?-44=73,?-145=128
82+68=?,65+144=?,163+228=?
3*9=?,5*7=?,8*9=?
24/8=?,24/6=?,24/4=?
---
?-136=271-117,64+77+82+98=?
142-86=?+54,74+62+126-221=?
88+?+75=223,166+88-92-102=?
58+?-39=142,500-123-234-111=?
酷暑难耐热