13.69乘0.4减0,969乘4,这道题的简便计算怎么写_数学解答

13.69乘0.4减0,969乘4,这道题的简便计算怎么写

人气：201 ℃　时间：2020-03-22 03:19:06

解答

13.69×0.4-0.969×4
=13.69×0.4-0.969×0.4×10
=13.69×0.4-9.69×0.4
=0.4×(13.69-9.69)
=0.4×4
=1.6