来自潘锐的问题
计算.(-5)×(-87/9)-(-7)×(＋79/9)+12÷(-9/79)不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(＋79/9)+12÷(-9/79)
计算.(-5)×(-87/9)-(-7)×(＋79/9)+12÷(-9/79)
不好意思,问题弄错了应该是(-5)×(-79/9)-(-7)×(＋79/9)+12÷(-9/79)
(-5)×(-87/9)-(-7)×(＋79/9)+12÷(-9/79)
=5×87/9+7×79/9-12×79/9
=5×87/9+79/9*（7-12）
=5×87/9-5×79/9
=5/9×（87-79）
=5/9×8
=40/9
不好意思，问题弄错了应该是(-5)×(-79/9)-(-7)×(＋79/9)+12÷(-9/79)
(-5)×(-79/9)-(-7)×(＋79/9)+12÷(-9/79)=5×79/9+7×79/9-12×79/9=79/9*(5+7-12)=79/9*0=0
大家都在问
最新问答
海冰含盐量接近淡水，...2020-12-30
三峡游山峰一下子就被...2020-12-30
二元一次方程简单的配...2020-12-30
【偏裨将校是什么意思...2020-12-30
如图秒表的读数为__...2020-12-30
____abigfi...2020-12-30
【知道本金和税后利息...2020-12-30
《一百条裙子》读后感...2020-12-30
利用矩阵解二元一次方...2020-12-30
【英语中的peasa...2020-12-30