Question

0,(5)•0,3b+0,5a•1,(6)b-2,3•3ab+0,9ab

Answer 1

0,(5)•0,3b+0,5a•1,(6)b-2,3•3ab+0,9ab
0,(5)=5/9
1,(6)=(16-1)/9=15/9=5/3
=5/9 • 3b/10+5a/10•5b/3-6,9ab+0,9ab=
=b/6+5ab/6-6ab=
=b/6+(5ab-36ab)/6=
=b/6-31ab/6=b(1-31a)/6