Respostas

2013-05-16T23:20:41-03:00

_ _ x 3 x 2 x 1 = 6.2 = 12

 

X _ _  X X = 6.2 = 12

X X _ _ X = 6.2 = 12

X X X _ _ = 6.2 = 12

 

12.4 = 48

 

a)

1 5 1