163又13分之1÷41又39分之1
=(160+40/13)÷(40+40/39)
=40x(4+10/13)÷[40x(1+1/39)]
=(4+10/13)÷(1+1/39)
=62/13÷40/39
=31/13÷20/39
=93/20
如果本题有什么不明白可以追问,
163又13分之1÷41又39分之1
=(160+40/13)÷(40+40/39)
=40x(4+10/13)÷[40x(1+1/39)]
=(4+10/13)÷(1+1/39)
=62/13÷40/39
=31/13÷20/39
=93/20
如果本题有什么不明白可以追问,