1. **Problem Statement:** Calculate the sum of each pair of integers given. 2. **Formula and Rules:** Adding integers involves combining positive and negative numbers. Key rules: - Adding a positive number moves right on the number line. - Adding a negative number moves left on the number line. - The sum of two numbers with the same sign keeps that sign. - The sum of numbers with different signs takes the sign of the number with the larger absolute value. 3. **Calculations:** -80 + 85 = 5 7 + (-85) = -78 -81 + (-54) = -135 13 + 73 = 86 83 + 11 = 94 82 + (-50) = 32 31 + 94 = 125 -88 + (-83) = -171 -79 + 94 = 15 -88 + 77 = -11 70 + 82 = 152 76 + 77 = 153 76 + 35 = 111 88 + 27 = 115 30 + 79 = 109 73 + (-82) = -9 94 + 62 = 156 44 + (-14) = 30 75 + (-75) = 0 48 + 90 = 138 49 + 91 = 140 19 + (-73) = -54 58 + (-77) = -19 79 + 88 = 167 53 + 82 = 135 70 + (-48) = 22 -74 + (-86) = -160 82 + 37 = 119 72 + 96 = 168 98 + (-12) = 86 80 + 54 = 134 73 + 75 = 148 90 + (-70) = 20 98 + (-94) = 4 93 + 66 = 159 70 + 95 = 165 83 + (-84) = -1 25 + (-95) = -70 59 + 2 = 61 90 + 80 = 170 21 + (-89) = -68 71 + (-78) = -7 89 + (-55) = 34 88 + (-84) = 4 94 + 25 = 119 76 + (-50) = 26 65 + 85 = 150 80 + (-70) = 10 82 + 69 = 151 72 + 55 = 127 4 + 99 = 103 -98 + 65 = -33 -16 + (-89) = -105 -73 + 25 = -48 98 + 92 = 190 -20 + (-83) = -103 70 + (-93) = -23 58 + 84 = 142 -88 + (-77) = -165 93 + (-84) = 9 -15 + (-67) = -82 88 + (-97) = -9 -77 + (-91) = -168 -75 + (-83) = -158 -98 + 91 = -7 -33 + (-76) = -109 -42 + (-15) = -57 -76 + (-26) = -102 -47 + 97 = 50 67 + 98 = 165 -5 + (-12) = -17 -95 + 77 = -18 99 + (-95) = 4 -95 + 86 = -9 -47 + (-98) = -145 4. **Summary:** Each sum is calculated by applying integer addition rules carefully. Final answers are listed above for each problem.