Respostas

2013-12-02T17:34:17-02:00
A) 3,021~  =   x

3021,21~ =  1000x

3021,21 - 3,021  =  1000x - x 
3018 = 999x
x = 3018/999   = 1006/333

B)  3,2222

3,2222 = x 
32,222 = 10 x

32,222 - 3,222 = 10x - x
29 = 9x 

x = 29/9
2 5 2
A melhor resposta!
2013-12-02T18:20:22-02:00