①(2又1/3-3又1/2+1又4/45)÷(1又1/6)
问题描述:
①(2又1/3-3又1/2+1又4/45)÷(1又1/6)
②【2又1/3-(7/9-11/12+1/6)×36】÷5
加---分!
还有,要简算 ②打错了,应是:②【2又1/27-(7/9-11/12+1/6)×36】÷5 ①的1又1/6应是负1又1/6
答
我的不简单么?
(1)
((2+1/3)-(3+1/2)+(1+4/45))/[-(1+1/6)]
=-(7/3-7/2+49/45)*(6/7) {化成假分数}
=-(6/3-6/2+7*6/45) {乘法分配率}
=-(2-3+14/15)=1/15
②[(2+1/27)-(7/9-11/12+1/6)*36]/5 {化成假分数}
=[55/27-(7*4-11*3+1*6)]/5 {乘法分配率}
=(55/27-1)/5
=(28/27)/5
=28/135