Gli amici del 10

"Gli amici del dieci", friends of ten in English, is an educational card game to learn the calculation of friends of ten, the core of mathematics, while having fun.
How to play?
There are two way:
The classic Memory game, but you must find the couple friend of ten (1 and 9, 2 and 8, etc.), if you find the 10, you can take it; for the final counting every couple count 1, the "ten" count 2.
"La Matta" (10), all the cards are dealt to the players and in turn each one draws a card from the next player. If you find a pair, you discard it. Whoever runs out of cards wins. You must insert only one 10 in the deck for this way.