1 乘法 90 等于多少？

1 × 89 = 89 1 × 91 = 91 1 × 92 = 92 1 × 88 = 88 1 × 93 = 93 1 × 87 = 87 1 × 94 = 94 1 × 86 = 86 2 × 90 = 180 3 × 90 = 270 4 × 90 = 360 5 × 90 = 450 6 × 90 = 540 7 × 90 = 630 8 × 90 = 720 9 × 90 = 810 2 × 45 = 90 3 × 30 = 90 5 × 18 = 90 6 × 15 = 90 9 × 10 = 90 10 × 9 = 90 16 × 21 = 336 45 × 45 = 2025 87 × 12 = 1044 78 × 15 = 1170 31 × 33 = 1023 26 × 70 = 1820 92 - 2 = 90 98 - 8 = 90