34.5乘76.5-345乘6.42-123乘1.45

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 19:42:57

34.5乘76.5-345乘6.42-123乘1.45
34.5乘76.5-345乘6.42-123乘1.45

34.5乘76.5-345乘6.42-123乘1.45
34.5乘76.5-345乘6.42-123乘1.45
=34.5×76.5-34.5×64.2-123×1.45
=34.5×(76.5-64.2)-123×1.45
=34.5×12.3-123×1.45
=34.5×12.3-12.3×14.5
=12.3×(34.5-14.5)
=12.3×20
=246

246