早教吧作业答案频道 -->数学-->
(2/3/7+4/6/14+14/21/49)/(4/7/9+8/14/18+28/49/63)=—?/代表除号
题目详情
(2/3/7+4/6/14+14/21/49)/(4/7/9+8/14/18+28/49/63)=—?
/代表除号
/代表除号
▼优质解答
答案和解析
(2÷3÷7+4÷6÷14+14÷21÷49)÷(4÷7÷9+8÷14÷18+28÷49÷63)
=(2÷3÷7+2÷3÷7+2÷3÷7)÷(4÷7÷9+4÷7÷9+4÷7÷9)
=(3*2÷3÷7)÷(3*4÷7÷9)
=(2÷3÷7)÷(4÷7÷9)
=2÷3÷7÷4*7*9
=2÷3÷4*9
=2/3
=(2÷3÷7+2÷3÷7+2÷3÷7)÷(4÷7÷9+4÷7÷9+4÷7÷9)
=(3*2÷3÷7)÷(3*4÷7÷9)
=(2÷3÷7)÷(4÷7÷9)
=2÷3÷7÷4*7*9
=2÷3÷4*9
=2/3
看了 (2/3/7+4/6/14+...的网友还看了以下: