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数学
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计算:(-9又1/5-99又2/15)×(-30).
人气:385 ℃ 时间:2020-06-28 20:43:35
解答
=(-10+4/5-100+13/15)*(-30)
=(10-4/5+100-13/15)*30
=110*30-4/5*30-13/15*30
=3300-24-26
=3250
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