(18/25-9/23)÷9/25-21/23简便

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(18/25-9/23)÷9/25-21/23简便
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(18/25-9/23)÷9/25-21/23简便
(18/25-9/23)÷9/25-21/23简便

(18/25-9/23)÷9/25-21/23简便
=18/25÷9/25-9/23÷9/25-21/23
=2-25/23-21/23
=2-2
=0