20 乘法 4 等于多少？

20 × 3 = 60 20 × 5 = 100 20 × 2 = 40 20 × 6 = 120 20 × 1 = 20 20 × 7 = 140 20 × 8 = 160 20 × 9 = 180 19 × 4 = 76 21 × 4 = 84 22 × 4 = 88 18 × 4 = 72 23 × 4 = 92 17 × 4 = 68 24 × 4 = 96 16 × 4 = 64 1 × 80 = 80 2 × 40 = 80 4 × 20 = 80 5 × 16 = 80 8 × 10 = 80 10 × 8 = 80 42 × 83 = 3486 82 × 96 = 7872 73 × 20 = 1460 92 × 69 = 6348 98 × 39 = 3822 87 × 88 = 7656 75 + 5 = 80 47 + 33 = 80