Respostas

2013-12-10T15:30:16-02:00
3     490        1470
--- . ------ = ------------- = 210 
7      (1)           7 


bons estudos (;
2013-12-10T15:55:55-02:00
3/7 de 490 = 3/7 * 490 = 3 * 490/7 = 3*70 = 210