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 63 × 17 = 1071 63 × 61 = 3843 16 × 34 = 544 92 × 27 = 2484 26 × 79 = 2054 90 × 94 = 8460 46 - 26 = 20 85 - 65 = 20 90 - 70 = 20