Question

[1,2(6) + 3,(6) - 3,5] : 0,4(3)

Answer 1

1,2(6)=(126-12)/90=114/90
3,(6)=(36-3)/9=33/9=33/9
0,4(3)=(43-4)/90=39/90
[1,2(6) + 3,(6) - 3,5] : 0,4(3)=
=[114/90 + 33/9 - 35/10] : 39/90=
=(114 + 330 - 315)/90 × 90/39=
=129/39=
=43/13