简算32.4*（5-8分之3）+2又5分之3*8分之3=_数学解答

简算32.4*（5-8分之3）+2又5分之3*8分之3=

人气：399 ℃　时间：2020-05-20 23:15:01

解答

32.4 X ( 5 - 3/8 ) + ( 2+ 3/5 ) X 3/8
= 32.4 X 5 - 32.4 X 3/8 + 2.6 X 3/8
= 162 + 3/8 X ( 2.6 - 32.4 )
= 162 + 3/8 X ( 2.2 - 32 )
= 162 - 3/8 X 32 + 3/8 X 11/5
= 162 - 12 + 33/40
= 150+ 33/40