Correct: -11 + (-2) = -13, -22 + (-4) = -26, -1 + (-3) = -4, -13 + (-1) = -14, -11 + 2 = -9, -1 + 3 = 2, 3 + (-2) = 1, -4 + (-2) = -6, 5 + (-3) = 2, -2 + 5 = 3, -2 + 7 = 5, 9 + (-1) = 8, -4 + 3 = -1, -5 + (-5) = -10, 10 + (-3) = 7, Incorrect: -1 + -2 = 3, -2 + 4 = -6, -2 + 4 = 6, -14 + 7 = 7, 25 + (-3) = -28, 8 + (-1)= 9, 8 + (-1) = -9, 4 + -3 = -1, -3 + (-4 )= 7, -15 + (-5) = 20,

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