56 - 69 = -13 -31 + 17 = -14-37 + 18 = -19 50 - 60 = -10-26 - 14 = -40 -12 + (-11) = -23 -1 + 18 = 17 36 + (-64) = -28-23 + 40 = 17 18 - 9 = 9----------------------------------------------------------------16 - (-14) = 30 -38 + 19 = -19 -24 - 24 = -48 47 - 54 = -7-45 + 15 = -30 -17 - 17 = -34-1 - 26 = -27 0 - 38 = -38-26 + 52 = 26 -18 + 36 = 18 ----------------------------------------------------------------54 + (-24) = 30 27 - 70 = -43-62 + 62 = 0 -8 - 15 = -23-36 - 14 = -50 0 - 23 = -23-1 - 1 = -2 -14 - 6 = -20 -38 + 19 = -19 -15 + 20 = 5-----------------------------------------------------------------38 - 45 = -7 73 - 84 = -11 -19 + 19 = 0 85 + (-100) = -15-25 + 50 = 25 39 - 43 = -4-28 - 4 = -32 -75 + 75 = 0-17 + (-7) = -24 91 - 47 = 44