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