a) 3,44 = 344/100
5,1282 = 51282/10000
2,01 = 201/100
0,0007 = 7/10000
0,01234 = 1234/100000
27,99 = 2799/100
581,01 = 58101/100
b) 0,(7) = 7/9
0,(93) = 93/99
0,(123) = 123/999
1,(07) = (107-1)/99 = 106/99
2,(3) = (23-2)/9= 21/9
5,(91) = (591-5)/99 = 586/99
3,(143) = (3143-3)/999 = 3140/999
c) 0,0(23)= 23/990
5,12(4) = (5124-512)/900 = 4612/900
23,22(13) = (232213-2322)/9900 = 229891/9900
44,0(5) = (4405-440)/90 = 3965/90
0,1(67) = (167-1)/990 = 166/990
