1.25x17.6+62.5除以0.8简便计算

分类: 作业答案 • 2022-09-25 10:44:27

问题描述：

答

1.25x17.5+62.5÷0.8
=1.25x17.5+62.5÷(4/5)
=5/4x17.5+62.5×5/4
=4/5×(17.5+62.5)
=5/4×80
=5×20
=100