1个回答
展开全部
(25分之17乘50分之3)乘51分之30乘125怎么简便计算
17/25X3/50X30/50X125
=17/25X3/50X30/50X25X5
=(25X17/25)X(5X3/50)X30/51
=17X3/10X30/51
=17X30/51X3/10
=10X3/10
=3
(此题主要运用了乘法交换律和结合律进行简便计算。)
9分之4乘4加9分之2乘2加9分之1乘2
4/9X4+2/9X2+1/9X2
=4/9X4+(2/9+1/9)X2
=4/9X4+3/9X2
=16/9+6/9
=22/9
(此题主要运用了乘法分配律进行简便计算,得数也可以写成2又4/9。)
17/25X3/50X30/50X125
=17/25X3/50X30/50X25X5
=(25X17/25)X(5X3/50)X30/51
=17X3/10X30/51
=17X30/51X3/10
=10X3/10
=3
(此题主要运用了乘法交换律和结合律进行简便计算。)
9分之4乘4加9分之2乘2加9分之1乘2
4/9X4+2/9X2+1/9X2
=4/9X4+(2/9+1/9)X2
=4/9X4+3/9X2
=16/9+6/9
=22/9
(此题主要运用了乘法分配律进行简便计算,得数也可以写成2又4/9。)
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询