Respostas

2014-03-07T02:43:49-03:00
2,090909.... = 23 
                     11
3,151515.... = 104 
                      33
2014-03-07T03:34:28-03:00
11 -  a) 2 +  \frac{9}{99} = \frac{207}{99}
         
         b) 3 +  \frac{15}{99} =  \frac{312}{99}

         c) x= 6,0666...
 \\ 10x=60,666...
 \\ 100x = 606,66...

 \\ 100x - 10x = 546 

 \\ 90 x = 546 
 \\  x= 546/90



         d)x=0,5727272...
 \\ 10x=5,727272...
 \\ 1000x=572,72727272...
 \\ 990x=567 
 \\  \\ x=567/990