2 乘法 20 等于多少？

2 × 19 = 38 2 × 21 = 42 2 × 22 = 44 2 × 18 = 36 2 × 23 = 46 2 × 17 = 34 2 × 24 = 48 2 × 16 = 32 1 × 20 = 20 3 × 20 = 60 4 × 20 = 80 5 × 20 = 100 6 × 20 = 120 7 × 20 = 140 8 × 20 = 160 9 × 20 = 180 1 × 40 = 40 4 × 10 = 40 5 × 8 = 40 8 × 5 = 40 10 × 4 = 40 20 × 2 = 40 95 × 60 = 5700 20 × 87 = 1740 19 × 26 = 494 62 × 77 = 4774 87 × 27 = 2349 22 × 99 = 2178 60 - 20 = 40 55 - 15 = 40