Question

Va rog foarte mult ajutati ma la 5 sau 6 ( sau ambele)
DAU COROANA !! !!

Answer 1

Răspuns:

Explicație pas cu pas:

5.

a) 0,(2)=2/9

b) 0,(8)=8/9

c) 1,(4)=(14-1)/9=13/9

d) 0,(14)=14/99

e) 0,(007)=7/999

f) 3,(27)=(327-3)/99=324/99=108/33=36/11

g) 0,5(4)=(54-5)/90=49/90

h) 0,07(2)=(72-7)/900=65/900=13/180

i) 0,21(02)=(2102-21)/9900=2081/9900

j) 1,3(12)=(1312-13)/990=1299/990=433/330

k) 2,05(7)=(2057-205)/900=1852/900=926/450=463/225

l) 0,4(27)=(427-4)/990=423/990=141/330=47/110

m) 1,0(21)=(1021-1)/990=1020/990=102/99=34/33

6.

a) 0,(2)+0,(6)=2/9+6/9=8/9

b) 0,(13)-0,(04)=13/99-4/99=9/99=1/11

c) 1,(7)+0,(6)=(17-1)/9+6/9=16/9+6/9=22/9

d) 3,(17)+0,(48)-2,(39)=(317-3)/99+48/99-(239-2)/99=314/99+48/99-237/99=362/99-237/99=125/99