87 加法 87 等于多少？

87 + 86 = 173 87 + 88 = 175 87 + 85 = 172 87 + 89 = 176 87 + 84 = 171 87 + 90 = 177 87 + 83 = 170 87 + 91 = 178 86 + 87 = 173 88 + 87 = 175 85 + 87 = 172 89 + 87 = 176 84 + 87 = 171 90 + 87 = 177 83 + 87 = 170 91 + 87 = 178 74 + 100 = 174 75 + 99 = 174 76 + 98 = 174 77 + 97 = 174 78 + 96 = 174 79 + 95 = 174 66 + 94 = 160 57 + 63 = 120 59 + 77 = 136 19 + 89 = 108 82 + 89 = 171 73 + 48 = 121 87 × 2 = 174 58 × 3 = 174