4.25/2.5*9.9+0.17怎么简便

分类: 作业答案 • 2021-12-17 20:21:10

问题描述：

答

=4.25*4*9.9/(2.5*4)+0.17
=17*9.9/10+0.17
=1.7*9.9+1.7*0.1
=1.7*(9.9+0.1)
=1.7*10
=17