递等式计算13.27-0.27*3.4+6.6

分类: 作业答案 • 2022-02-05 11:13:16

问题描述：

答

13+0.27-0.27*3.4+6.6
=13+0.27*(1-3.4)+6.6
=13+0.27*6.6+6.6
=13+(0.27+1)*6.6
=13+1.27*6.6
=21.382