某日,我检查外甥的数学课外作业。我发现他在做分数乘法习题时,不管是在纯计算的题目还是解决实际问题的题目中,计算结果是假分数的都没有化成带分数,我有些不解问其原因,他说老师没要求,课本也是这样。我翻阅课本(北师大版五年级下册第一单元)看到第4页上面的“做一做”中的结果也是“”。后来,我与我校高年级数学老师交流,了解到在老教材的计算法则中有这样一句:计算结果能约分 One day, I checked math homework outside my nephew. I found that when he was doing fractional multiplication exercises, neither the purely calculated nor the real problem was solved. The result of the calculation was that none of the fake scores had been converted into a banding score, and I did not understand why. He said that the teacher did not ask The same is true for textbooks. I read the textbook (Beijing Normal University version of the fifth grade volumes of the first unit) to see page 4 above “to do ” in the result is “”. Later, I communicated with the senior math teacher in our school and learned that there is such a sentence in the calculation rule of old teaching materials that the calculation result can be divided by about