与19/35的大小时,有些学生看到比较大小，又是异分母,就想到通分。其

When compared with the size of 19/35, some students think of the common denominator when they see that the size is relatively large, but it is also a different denominator. In fact, this question does not need to pass points, as long as you estimate: 12/251/2, you can judge 12/25

When compared with the age of 19 / 35, some students see that the size is different and the denominator is different, so they think of general score. In fact, there is no need to divide this question. As long as you estimate: 12 / 251 / 2, you can judge 12 / 25

When compared with the size of 19/35, some students think of a general score when they see that the size is different from the denominator. In fact, this question can be judged as 12/25 as long as it is estimated as 12/251/2.