Respostas

2014-03-24T15:37:26-03:00
2,555... = 2 +5/9 = 23/9
1,4 = 14/10 = 7/5

(2,555... - 2/9) : (1,4 - 7/18) =
 (23/9 - 2/9) : ( 7/5 - 7/18) = ----mmc(5,18) = 90
 21/9 : (126/90 - 35/90)=
 21/9 : 91/90 = 21/9 . 90/91= 1890/819 = 210/91

2014-03-24T15:49:42-03:00