6×7/12—9/20×6+11/30×6

来源：学生学帮网 编辑：学帮网 时间：2024/06/25 09:45:30

6×7/12—9/20×6+11/30×6

6×7/12—9/20×6+11/30×6
=42/12+0.45*6+11/5
=3.5+2.7+2.2
=8.4