2七分之二+4七分之五=7
7五分之四+8五分之一=16
所以(2七分之二+7五分之四+4七分之五+8五分之一)=7+16=23
2-十五分之七=23/15
23÷23/15=15
(2七分之二+7五分之四+4七分之五+8五分之一)除以(2-十五分之七)=
(2七分之二+7五分之四+4七分之五+8五分之一)除以(2-十五分之七)=
其他人气:490 ℃时间:2019-12-09 01:19:08
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