Răspuns:
a) 1,(8) =
=(18-1)/9=17/9
b) 2,(27) =
=(227-2)/99=225/99=25/11
c) 4,(567)=(4567-4)/999=
=4563/999=507/111
71/3
a) 0,2 (6) =
=(26-2)/90=24/90=4/15
b) 0,03 (27) =(327-3)/9900=
=324/9900=18/550=9/275
c) 1,2 (15)=(1215-12)/990=1213/990
71/4
a) 0,(3) = 3/9=1/3
b) 0,(31) = 31/99
c) 1,(13) =(113-1)/99=112/99