#谈笑有“宏”儒#这是一组很神奇的数学运算题,你曾经发现了吗?1 x 8 + 1 = 9, 12 x 8 + 2 = 98, 123 x 8 + 3 = 987, 1234 x 8 + 4 = 9876, 12345 x 8 + 5 = 98765, 123456 x 8 + 6 = 987654, 1234567 x 8 + 7 = 9876543, 12345678 x 8 + 8 = 98765432, 123456789 x 8 + 9 = 987654321。
