简算；3又5/3*25又5/2+37.9*6又5/2_数学解答

简算；3又5/3*25又5/2+37.9*6又5/2

人气：397 ℃　时间：2020-04-10 11:38:13

解答

3.6*25.4+37.9*6.4
=(10-6.4)*25.4+37.9*6.4
=254+(37.9-25.4)*6.4
=254+12.5*6.4
=254+12.5*8*0.8
=254+100*0.8
=254+80
=334