3又23分之3乘以5/29+5/23*20/29
问题描述：
3又23分之3乘以5/29+5/23*20/29
答
(3+3/23)*(5/29)+(5/23)*(20/29)
=(72/23)*(5/29)+(5/23)*(20/29)
=(72*5+5*20)/(23*29)
=5*92/(23*29)
=5*4/29
=20/29