如题所述
=120-272÷2÷17
=120-136÷17
=120-8
=112
望采纳
=120-136÷17
=120-8
=112
望采纳
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第1个回答 2015-04-03
120-272/34
=120-34*8/34
=120-8
=112
=120-34*8/34
=120-8
=112
