81 加法 87 等于多少？

81 + 86 = 167 81 + 88 = 169 81 + 85 = 166 81 + 89 = 170 81 + 84 = 165 81 + 90 = 171 81 + 83 = 164 81 + 91 = 172 80 + 87 = 167 82 + 87 = 169 83 + 87 = 170 79 + 87 = 166 84 + 87 = 171 78 + 87 = 165 85 + 87 = 172 77 + 87 = 164 68 + 100 = 168 69 + 99 = 168 70 + 98 = 168 71 + 97 = 168 72 + 96 = 168 73 + 95 = 168 14 + 93 = 107 6 + 6 = 12 81 + 62 = 143 29 + 21 = 50 85 + 63 = 148 51 + 71 = 122 28 × 6 = 168 12 × 14 = 168