1. A)51,23=5123/100
B) 3,537/1000
C) 0,12=12/100=3/25
D) 2,16=216/100=54/25
E)5,123=5123/1000
F) 2,(3)=23-2/9=21/9=7/3
G) 0,(1)=1/9
H)2,(24)=224-2/99=222/99=74/33
I)7,(223)=7223-8/999=7215/999=2405/333
J)0,(234)=234/999=78/333=26/111
K)21,(16)=2116-21/99=2095/99
L)4,3(2)=432-43/90=391/90
M)2,1(16)=2116-21/990=2095/990
N)3,53(7)=3537-353/900=3184/900
O)2,30(12)=23012-230/9900=22782/9900=11391/4500=3797/1500
P)7,2(605)=72605-72/9990=72533/9990
Q)
5,372(4)=53724-5372/9000=48352/9000=24176/4500=12088/2500=6044/1250=3022/625