1 乘法 1 等于多少？

1 × 2 = 2 1 × 3 = 3 1 × 4 = 4 1 × 5 = 5 1 × 6 = 6 1 × 7 = 7 1 × 8 = 8 1 × 9 = 9 2 × 1 = 2 3 × 1 = 3 4 × 1 = 4 5 × 1 = 5 6 × 1 = 6 7 × 1 = 7 8 × 1 = 8 9 × 1 = 9 3 × 3 = 9 51 - 50 = 1 83 - 82 = 1 57 - 56 = 1 24 - 23 = 1 11 × 66 = 726 19 × 78 = 1482 21 × 66 = 1386 56 × 93 = 5208 79 × 98 = 7742 73 × 6 = 438