20 乘法 1 等于多少？

20 × 2 = 40 20 × 3 = 60 20 × 4 = 80 20 × 5 = 100 20 × 6 = 120 20 × 7 = 140 20 × 8 = 160 20 × 9 = 180 19 × 1 = 19 21 × 1 = 21 22 × 1 = 22 18 × 1 = 18 23 × 1 = 23 17 × 1 = 17 24 × 1 = 24 16 × 1 = 16 1 × 20 = 20 2 × 10 = 20 4 × 5 = 20 5 × 4 = 20 10 × 2 = 20 35 × 76 = 2660 99 × 40 = 3960 55 × 23 = 1265 44 × 61 = 2684 51 × 83 = 4233 17 × 62 = 1054 45 - 25 = 20 49 - 29 = 20 56 - 36 = 20