465+328=?,292+472=?,490+701=?
740-86=?,982-600=?,951-120=?
40+?=889,253+?=798,330+?=974
65*7=?,6*141=?,898*4=?
210/3=?,424/8=?,864/9=?
---
?-297=886-439,147+127+408+162=?
777-283=?+331,522+354+216-942=?
255+?+375=936,410+440-268-351=?
212+?-508=471,999-266-120-496=?
天寒地冻冷