80 乘法 9 等于多少？

80 × 8 = 640 80 × 10 = 800 80 × 11 = 880 80 × 7 = 560 80 × 12 = 960 80 × 6 = 480 80 × 13 = 1040 80 × 5 = 400 79 × 9 = 711 81 × 9 = 729 78 × 9 = 702 82 × 9 = 738 83 × 9 = 747 77 × 9 = 693 84 × 9 = 756 76 × 9 = 684 8 × 90 = 720 9 × 80 = 720 10 × 72 = 720 12 × 60 = 720 15 × 48 = 720 16 × 45 = 720 54 × 57 = 3078 91 × 87 = 7917 75 × 29 = 2175 66 × 63 = 4158 77 × 38 = 2926 36 × 81 = 2916 83 × 50 = 4150 39 × 79 = 3081