Question

Doar 4 si 5 cu rezolvari dau coroana

Answer 1

4.

a)0,3=3/10

b) 0,(31)=31/99

c)1,(13)=(113-1)/99=112/99

d)2,(107)=(2107-2)/999=2105/999

e)0,2(3)=(23-2)/90=21/90=7/30

f)0,12(3)=(123-12)/900=111/900

g)0,01(72)=(172-1)/9900=171/9900

h)1,2(108)=(12108-12)/9990=12096/9990=6048/4995

i)2,73(5)=(2735-273)/900=2462/900=1231/450

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


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


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


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

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

k) 2,05(7)=(2057-7)/900=2050/900=205/90=41/18

m) 1,0(21)=(1021-21)/990=1000=990=100/99

l) 0,4(27) = (427-27)/990