上2千克，就等于五年级老师分的。
正确解法：设四年级老师分x千克。
2x-2=50，2x=52，x=26。
答：四年级老师分26千克。
张兰有64张画片，李飞又送她12张，这时张兰和，李飞的画片数相等，李飞原有画片多少张?
错解设李飞原有画片x张，列方程得：
x-12=64，x=76。
分析李飞送12张画片给张兰后，两人的画片数才相等，也就是说，李飞减少12张，张兰增加12张之后，他们的画片数才同样多，上面的解法把，等量关系弄错了，误认为李飞的画片减少12张后与，张兰原有的画片数相等。
正确解法：设李飞原有画片x张。
x-12=64+12，x=88。
答：李飞原有画片88张。
南宫御说：哇，夏婷你好厉害啊，数学好难啊，看着我头都大了，还是不会，老师讲的我都听不懂，你讲的，我居然听懂了，哈哈，夏婷说：啊哈哈哈哈哈，南宫御说着：夏婷，你教我一道英语作文吧，夏婷：好滴，你看作文的题目是，A thousand words 意思是：一致性与凝聚力
Consistency and cohesion: a large amount of evidence shows that with the development of technology, the gap between the rich and the poor is growing. One of the reasons is that the use of household appliances is gradually replacing the labor force, because the use of artificial equipment is more convenient and economical than employing people. In this case, many unskilled and well-educated workers in other sectors will get lower scores in the same job They may even lose their jobs。
Moreover, the lack of education expenditure in these families leads to the lack of skills and knowledge of their children. Such barriers are difficult to eliminate the intergenerational gap. However, parents should not take this as an excuse to evade their responsibilities……