1 乘法 4 等于多少？

1 × 3 = 3 1 × 5 = 5 1 × 2 = 2 1 × 6 = 6 1 × 1 = 1 1 × 7 = 7 1 × 8 = 8 1 × 9 = 9 2 × 4 = 8 3 × 4 = 12 4 × 4 = 16 5 × 4 = 20 6 × 4 = 24 7 × 4 = 28 8 × 4 = 32 9 × 4 = 36 2 × 2 = 4 4 × 1 = 4 9 × 1 = 9 2 × 1 = 2 20 - 16 = 4 52 - 48 = 4 41 - 37 = 4 49 - 45 = 4 53 × 30 = 1590 53 × 12 = 636 80 × 19 = 1520 73 × 7 = 511 21 × 35 = 735 24 × 25 = 600