31.40.43+7.23.14--0.314*15 递等式解答!快!

分类: 作业答案 • 2021-12-30 12:34:54

问题描述：

31.4*0.43+7.2*3.14--0.314*15 递等式解答!快!

答

31.4*0.43+7.2*3.14--0.314*15
=31.4*0.43+0.72*31.4-31.4*0.15
=31.4*(0.43+0.72-0.15)
=31.4*1
=31.4

31.4*0.43+7.2*3.14--0.314*15 递等式解答!快!