28 乘法 1 等于多少？

28 × 2 = 56 28 × 3 = 84 28 × 4 = 112 28 × 5 = 140 28 × 6 = 168 28 × 7 = 196 28 × 8 = 224 28 × 9 = 252 29 × 1 = 29 27 × 1 = 27 30 × 1 = 30 26 × 1 = 26 31 × 1 = 31 25 × 1 = 25 32 × 1 = 32 24 × 1 = 24 1 × 28 = 28 2 × 14 = 28 4 × 7 = 28 7 × 4 = 28 14 × 2 = 28 80 × 87 = 6960 85 × 18 = 1530 13 × 92 = 1196 57 × 49 = 2793 85 × 57 = 4845 43 × 98 = 4214 32 - 4 = 28 48 - 20 = 28 8 + 20 = 28