61+4x610+59x61 99999x77778+33333x66666 = = = = 要用简便方法谢谢 = =

分类: 作业答案 • 2022-09-25 15:48:46

问题描述：

答

1： =61*1+40*61+59*61 =61*(1+40+59) =61*100 =6100 2: =99999*77778+99999*22222 =99999*(77778+22222) =99999*100000 =9999900000