Question

escreva as fraçoes correspondes aos numeros
a) 1,3333...
b) 25,677777...
c) 8,15555....
d) 9,2777...

Answer 1

a) 1,3333...

(1)x = 1 ,333...
(2)10x = 13,333...

10x -x = 13 -1 

9x = 12

x = 12/9

b) 25,677777...

(1)10x = 256,777...
(2)100x = 2567,777...

100x -10x = 2567 - 256

90x = 2311

x = 2311/90

c) 8,15555....

(1)10x = 81,55...
(2)100x = 815,55...

100x - 10x = 815 - 81

90x = 734

x = 734/90

d) 9,2777...

(1)10x = 92,77...
(2)100x = 927,77...

100x - 10x = 927 - 92

90x = 835

x = 835/90