1/4*（-8/9）=?（-5/6）*（-3/10）=?-34/15*25=?（-0.3）*（-10/7）=?
人气：257 ℃ 时间：2020-04-24 08:49:56
解答
1/4*（-8/9）=-2/9
（-5/6）*（-3/10）=1/4
-34/15*25=-170/3
（-0.3）*（-10/7）=3/7过程
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