25又4/5-2.35*又3/8-8.625*2又7/20_数学解答

25又4/5-2.35*又3/8-8.625*2又7/20

人气：217 ℃　时间：2020-03-29 13:59:22

解答

25·4/5-2.35×3/8-8.625×2·7/20
=25·4/5-2·7/20×3/8-8·5/8×2·7/20
=25·4/5-2·7/20(3/8+5/8)
=25·4/5-2·7/20
=25+4/5-2-7/20
=23+16/20-7/20
=23+9/20
=23·9/20