252+326=?,126+436=?,359+752=?
688-76=?,990-553=?,914-291=?
87+?=604,535+?=707,270+?=916
28*7=?,52*9=?,328*3=?
84/6=?,284/4=?,936/6=?
---
?-287=894-422,105+198+454+177=?
791-211=?+362,504+325+215-918=?
228+?+392=908,498+290-159-303=?
250+?-497=366,999-344-164-340=?
少数民族壮