a)2,(46):7,(3)=
(246-2)/99 : (73-7)/9=
244/99 * 9/66= 122/11*33=122/363=0,3360..
b)5,2(3)-1,23=
(523-52)/90 - 123/100=
471/90 - 123/100=
4710/900-1107/900= 3603/900=1201/300
c)2,4(3)+7,(35)=
(243-24)/90+ (735-7)/99=
219/90+728/99=
2409/990 +7280/990=9689/990=
d)6,(82)*0,5=
(682-6)/99 * 5/10=
676/99 * 1/2= 676/198
