(123456789/123456788-123456788/123456789)除以(1/123456788+1/12
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(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
![(123456789/123456788-123456788/123456789)除以(1/123456788+1/12](/uploads/image/z/7499236-4-6.jpg?t=%28123456789%2F123456788-123456788%2F123456789%29%E9%99%A4%E4%BB%A5%281%2F123456788%2B1%2F12)
(123456789/123456788-123456788/123456789)除以(1/123456788+1/123456789)
=(1+1/123456788-(1-1/123456789))除以(1/123456788+1/123456789)
=(1+1/123456788-1+1/123456789))除以(1/123456788+1/123456789)
=(1/123456788+1/123456789))除以(1/123456788+1/123456789)
=1
=(1+1/123456788-(1-1/123456789))除以(1/123456788+1/123456789)
=(1+1/123456788-1+1/123456789))除以(1/123456788+1/123456789)
=(1/123456788+1/123456789))除以(1/123456788+1/123456789)
=1
(123456789/123456788-123456788/123456789)除以(1/123456788+1/12
[1/123456788-1/123456789]除以[1/123456788+1/123456789]
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