如题所述
68x72å28x68çäº
=68*ï¼72+28ï¼
=68*100
=6800
=68*ï¼72+28ï¼
=68*100
=6800
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第1个回答 2020-04-27
68×72+28×68
=68×(72+28)
=68×100
=6800
=68×(72+28)
=68×100
=6800