Matching Pairs matematica secundariaOnline version operaciones by Domingo Alejo Trinidad Salomon 1 (-5) * (-8)= 2 (-8+5) x 4= 3 -8-4-8+20 4 (2)4 = 5 -3-5-8 6 8-4-9+7= 7 (12x5) - 45 = 8 5-7-6 -16 -8 2x2x2x2 40 -12 0 2 15