87 加法 81 等于多少？

87 + 80 = 167 87 + 82 = 169 87 + 83 = 170 87 + 79 = 166 87 + 84 = 171 87 + 78 = 165 87 + 85 = 172 87 + 77 = 164 86 + 81 = 167 88 + 81 = 169 85 + 81 = 166 89 + 81 = 170 84 + 81 = 165 90 + 81 = 171 83 + 81 = 164 91 + 81 = 172 68 + 100 = 168 69 + 99 = 168 70 + 98 = 168 71 + 97 = 168 72 + 96 = 168 73 + 95 = 168 96 + 42 = 138 95 + 81 = 176 56 + 60 = 116 62 + 85 = 147 53 + 72 = 125 35 + 90 = 125 3 × 56 = 168 2 × 84 = 168