Question

m.c.m de 320 y 640.
m.c.m de 420 y 1.260

Answer 1

m c m 320 y 640

320/2                       640/2              

160/2                       320/2

80/2                         160/2                mcm 320 = 6 a la 2 x 5

40/2                           80/2                          640 = 7 a la 2 x 5

20/2                           40/2               mcm  2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 = 640

10/2                           20/2 

5/5                             10/2

1                                 5/5

                                    1