464+336=?,263+454=?,413+701=?
785-14=?,966-658=?,971-153=?
45+?=809,210+?=706,395+?=986
69*7=?,9*72=?,345*4=?
688/8=?,380/5=?,444/6=?
---
?-257=885-416,168+188+448+171=?
705-229=?+394,528+355+261-983=?
241+?+305=939,449+472-220-324=?
212+?-552=407,999-217-130-479=?
干燥勤喝水