有一个两位数,它的个位上的数字与十位上的数字的和是6如果把它个位上的数字与十位上的数字调换位置,所得

2024年11月20日 18:23
有5个网友回答
网友(1):

24 和 42
解答如下:设这个两位数个位数为x,十位数为y,则x+y=6,(10x+y)*(10y+x)=1008,由x+y=6得到y=6-x,所以有(10*x+6-x)*(10(6-x)+x) = 1008,化简得到x*x-6x+8=0,所以x=2或4

网友(2):

设个位数是X,十位上的数为Y,X+Y=6,(10Y+X)*(10X+Y)=1008, 化简可以得出6Y-Y(平方)=8,可以得出Y=2或4,所以答案是24或者42

网友(3):

设它的个位数为X
这个数为 10(6-x)+x=60-10x+x=90-9x
对调位置为
10x+6-x=6+9x
所以(6+9X)(60-9x)=1008
解出来就是个位数了

网友(4):

1008=24*42
所以这个两位数是42或24

网友(5):

设个位的数为x,则十位的数为6-x
那么(10x+6-x)【10(6-x)+x】=1008
解得x=2或4
6-x=4或2
则该2位数是24或42

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