Respuestas

2013-08-14T04:00:19+02:00
4/9;16/18 ;20/45 ,28/63 ;32/72
3/5; 6/10; 15/25; 21/35; 24/40; 27/45
7/8; 14/16; 35/40; 49/56; 56/64; 63/72
 SIMPLIFICAR
2/3     77/55           5/8