CALCULOS - full mixed calculus set !

the full set of mixed calculus !
additions, substractions, multiplications and divisions !
level 1 : 13 cards - 4 calculus per card
level 2 : 20 cards - 5 calculus per card
level 3 : 30 cards - 6 calculus per card
level 4 : 55 cards - 8 calculus per card
 
### email to xw.serious.games@gmail.com to order ! ###