28 加法 53 等于多少？

28 + 52 = 80 28 + 54 = 82 28 + 51 = 79 28 + 55 = 83 28 + 56 = 84 28 + 50 = 78 28 + 57 = 85 28 + 49 = 77 29 + 53 = 82 27 + 53 = 80 30 + 53 = 83 26 + 53 = 79 31 + 53 = 84 25 + 53 = 78 32 + 53 = 85 24 + 53 = 77 1 + 80 = 81 2 + 79 = 81 3 + 78 = 81 4 + 77 = 81 5 + 76 = 81 6 + 75 = 81 40 + 94 = 134 87 + 41 = 128 86 + 53 = 139 77 + 15 = 92 25 + 39 = 64 36 + 82 = 118 9 × 9 = 81 85 - 4 = 81