求解一道Prep上的题目，百思不得其解

comecomo

题目请参看图片；
想了半天也搞不明白！！！望大家帮忙！
拜谢！~

danoulini

这道题是 x，y，z分别于4，e，f 相加（左上角的运算符），所得的9个结果。lz多列几个等式就算出来了。

zhongyaya

This question is less complex than it appears. In the "addition table," the value from the vertical column + the value from the horizontal row is expressed where the two intersect. For example, 4 + X = -1, since the row with X and the column with 4 intersect at -1.
Since 4 + X = -1, X = -5
Following the same logic,
4 + Y = -5, so Y = -9
E + X = 7, so, E + -5 = 7, and E = 12
E + Y = N, so 12 + -9 = N, and N = 3
E + Z = 10, so 12 + Z = 10, and Z = -2
4 + Z = M, so 4 + -2 = M, and M = 2

M + N = 3 + 2 = 5. The correct answer is C

这是我从别的地方找到的~以后可以直接搜索google~这样比发帖问问题快~

zhongyaya

条件有变化~但方法不变的·

zhongyaya

按照上述方法算出来m=4,n=1 答案还是5~选C

comecomo

非常感谢各位大侠~~~
我前面的理解完全相反的~~~
明白了~~