用递等式计算25x32x125越简便越好

问题描述:

用递等式计算25x32x125
越简便越好

25x32x125
=25x4x8x125
=100x1000
=100000

25x32x125=25x4×8x125
=100×1000
=100000
什么叫“递等式”啊?