X是个数为10
(x-8/x-9)-(x-7/x-8)+(x-5/x-6)-(x-4/x-5)
=(10-8/10-9)-(10-7/10-8)+(10-5/10-6)-(10-4/10-5)
=(2/I)-(3/2)+(5/4)-(6/5)
=2-1.5+1.25-1.2
=0.5+1.25-1.2
=1.75-1.2
=0.55
X是个数为10
(x-8/x-9)-(x-7/x-8)+(x-5/x-6)-(x-4/x-5)
=(10-8/10-9)-(10-7/10-8)+(10-5/10-6)-(10-4/10-5)
=(2/I)-(3/2)+(5/4)-(6/5)
=2-1.5+1.25-1.2
=0.5+1.25-1.2
=1.75-1.2
=0.55