65+?=728,431+?=865,388+?=994
462-68=?,729-121=?,854-381=?
327+493=?,252+585=?,401+622=?
20*5=?,26*7=?,12*10=?
27/?=?,64/4=?,150/10=?
---
?-311=767-424,187+237+393+105=?
816-248=?+326,303+183+253-619=?
258+?+373=916,427+215-103-367=?
246+?-403=287,999-325-193-305=?
自行车比赛