Question

(PUC-RIO - RJ) A soma de 1,333... + 0,1666... é igual a :

a)1/2
b)5/2
c)4/3
d)5/3
e)3/2

Answer 1

x'=1,333...
10x'=13,3333
9x'=12
x'=12/9
x''=0,1666...
10x"=1,666....
100x"=16,666.....
90x"=15
x"=15/90
12/9 + 15/90
135 /90
15 /10
3/2

Answer 2

1,333...= 12    
              9           =>12/9+15/90=  1215 /810= 1,5= 3/2 e)
0,1666..= 15      
               90