80 加法 91 等于多少？

80 + 92 = 172 80 + 90 = 170 80 + 93 = 173 80 + 89 = 169 80 + 94 = 174 80 + 88 = 168 80 + 95 = 175 80 + 87 = 167 79 + 91 = 170 81 + 91 = 172 78 + 91 = 169 82 + 91 = 173 83 + 91 = 174 77 + 91 = 168 84 + 91 = 175 76 + 91 = 167 71 + 100 = 171 72 + 99 = 171 73 + 98 = 171 74 + 97 = 171 75 + 96 = 171 76 + 95 = 171 38 + 37 = 75 18 + 36 = 54 37 + 71 = 108 21 + 94 = 115 77 + 82 = 159 94 + 51 = 145 57 × 3 = 171 19 × 9 = 171