488+366=?,272+474=?,434+766=?
712-77=?,973-652=?,949-166=?
89+?=882,277+?=716,362+?=910
52*8=?,79*9=?,291*3=?
801/9=?,939/3=?,756/6=?
---
?-293=822-487,142+152+471+101=?
722-277=?+364,592+329+210-985=?
209+?+379=964,459+448-244-387=?
261+?-506=464,999-270-123-466=?
橡皮擦厉害