Suma de 2 en 2

0 - ____________________ - ____________________ - ____________________ - ____________________ - 10 - ____________________ - ____________________ - ____________________ - ____________________ - 20 - ____________________ - ____________________ - ____________________ - ____________________ - ____________________ - 32 - ____________________ - ____________________ - ____________________ - ____________________ - 42 - ____________________ - ____________________ - ____________________ - ____________________ - 52 - ____________________ - ____________________ - ____________________ - 6 0