25又4/5-2.35*又3/8-8.625*2又7/20
人气：122 ℃ 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
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