25乘(56加72)乘125怎么巧算

分类: 作业答案 • 2021-12-28 15:22:14

问题描述：

25乘(56加72)乘125怎么巧算

答

25x(56+72)x125
=25x128x125
=25x4x4x8x125
=(25x4)x4x(8x125)
=100x4x1000
=400x1000
=400000