253+528=?,289+537=?,492+601=?
745-74=?,822-221=?,834-329=?
55+?=887,237+?=878,316+?=946
72*3=?,85*6=?,112*5=?
85/5=?,96/8=?,189/7=?
---
?-252=747-408,173+236+346+128=?
881-275=?+360,344+273+277-663=?
257+?+315=980,467+227-164-365=?
213+?-467=359,999-350-165-334=?
吃美味佳肴