mvalencia58 mvalencia58 22-03-2021 Mathematics contestada Hi there i need help in this 1 (-23) + (-15) = 2 12 + 24 = 3 (-28) + (-16) = 4 15 + 29 = 5 29 + (-13) = 6 (-14) + (-10) = 7 + (-20) = 8 (-21) + 19 = 9 11 + (-20) = 10 24 + (-6) = 11 28 + 15 = 12 23 + (-19) = pls are negative and positive numbers