运用简便方法计算:(7/18+5/9)*27/35
人气:492 ℃ 时间:2019-10-19 10:39:07
解答
(7/18+5/9)*27/35
=7/18x27/35+5/9x27/35
=3/10+3/7
=21/70+30/70
=51/70 希望能帮你忙,懂了请采纳,
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