当一个正的真分数的分子、分母同时加上一个相同的正数时,分数的值会变大,而且这个加数的值越大,分数的值也就越大．也就是若有a/b>0,m>0,则(a+m)/(b+m)>a/b．证明如下: When a numerator and denominator of a positive true score add a same positive number at the same time, the value of the score will become larger, and the larger the value of this addend, the larger the value of the score. That is, if a/b>0 and m>0, (a+m)/(b+m)>a/b. The proof is as follows: