34.576.5-3456.42-123*1.45的简算

分类: 作业答案 • 2021-12-02 10:58:18

问题描述：

34.5*76.5-345*6.42-123*1.45的简算

答

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

34.5*76.5-345*6.42-123*1.45的简算