1 乘法 20 等于多少？

1 × 19 = 19 1 × 21 = 21 1 × 22 = 22 1 × 18 = 18 1 × 23 = 23 1 × 17 = 17 1 × 24 = 24 1 × 16 = 16 2 × 20 = 40 3 × 20 = 60 4 × 20 = 80 5 × 20 = 100 6 × 20 = 120 7 × 20 = 140 8 × 20 = 160 9 × 20 = 180 2 × 10 = 20 4 × 5 = 20 5 × 4 = 20 10 × 2 = 20 20 × 1 = 20 47 × 38 = 1786 45 × 77 = 3465 65 × 38 = 2470 26 × 91 = 2366 25 × 60 = 1500 44 × 57 = 2508 52 - 32 = 20 70 - 50 = 20 60 - 40 = 20