他不擅长数学：he is not good at math。他在这方面有点困难：he has some difficulties in this area。你能帮助他：you can help him。你能够帮助他提高数学成绩吗：could you help him improve his math grades。你能提供一些学习方法给他吗：can you provide some study methods for him。你愿意教他一些数学概念吗：would you be willing to teach him some math concepts。