48x1.08+1.2x56.8的简便算法

分类: 作业答案 • 2021-11-13 00:47:17

问题描述：

答

48x1.08+1.2x56.8
=48x1.08+48÷40x56.8
=48x1.08+48x(56.8÷40)
=48x1.08+48x1.42
=48x(1.08+1.42)
=48x2.5
=24x2x2.5
=24x5
=120