a,b是倒数,4分之a:b分之5,比值是几
问题描述:
a,b是倒数,4分之a:b分之5,比值是几
答
ab=1
a/4:5/b=ab/4:5
=1:20
a,b是倒数,4分之a:b分之5,比值是几
ab=1
a/4:5/b=ab/4:5
=1:20