13.7×0.28×8简便算法如何算_数学解答

13.7×0.28×8简便算法如何算

人气：183 ℃　时间：2020-03-24 11:01:52

解答

13.7×0.28×8
=(12.5+1.2)*(0.25+0.03)*8
=12.5*0.25*8+12.5*0.03*8+1.2*0.25*8+1.2*0.03*8
=25+3+2.4+0.288
=30.688