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35*63-37*35怎么用简便计算
人气:401 ℃ 时间:2020-06-25 17:24:41
解答
35*(63-37)
=35*28
=35*(20+8)
=35*20+35*8
=700+(30+5)*8
=700+30*8+5*8
=700+240+40
=980
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