1234567890/1234567890+123-123=?这道题要求脱式.

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1234567890/1234567890+123-123=?
这道题要求脱式.

1234567890/1234567890+123-123
=1+123-123
=124-123
=1

1234567890/1234567890+123-123
=1+123-123
=124-123
=1

......1

1234567890/1234567890+123-123=1+(123-123)=1+0=1

456

1234567890/1234567890+123-123
=1+123-123
=124-123
=1