Matching Pairs SUMA/RESTA ENTEROS IIOnline version Opera by Alejandro García Doblado 1 -14-25= 2 -6 - (-5)= 3 9-(+15)= 4 -18+7= 5 8 + (-7)= 6 -18-2= 7 7-(-4)= 8 9 - (-5)= 9 -2 + (-4) 11 -39 6 -1 1 -11 -20 -6 14