2 乘法 10 等于多少？

2 × 11 = 22 2 × 9 = 18 2 × 12 = 24 2 × 8 = 16 2 × 13 = 26 2 × 7 = 14 2 × 14 = 28 2 × 6 = 12 1 × 10 = 10 3 × 10 = 30 4 × 10 = 40 5 × 10 = 50 6 × 10 = 60 7 × 10 = 70 8 × 10 = 80 9 × 10 = 90 1 × 20 = 20 4 × 5 = 20 5 × 4 = 20 10 × 2 = 20 20 × 1 = 20 31 × 48 = 1488 99 × 23 = 2277 51 × 34 = 1734 19 × 39 = 741 68 × 72 = 4896 80 × 8 = 640 11 + 9 = 20 88 - 68 = 20 59 - 39 = 20