Question

0.25x72x4x72的简便计算方法

Answer 1

一 0.25X72X4X72=（0.25X4）X72X72=1X72²=72²

二 0.25X72X4X72=1/4X4X72X72=72X72=（72X7X10）+（72X2）=5040+144=5184

方法：凑成1，把四个数相乘变成两个二个数相乘；再把二位数乘法变成一位数乘法，就方便心算了。

Answer 2

你好！
0.25×72×4×72
=（0.25×4）×72
=1×72
=72

Answer 3

0.25X4=100，72X72=5184，0.25x72x4x72=5184