这道数学题应该在半小时内解出来。
这道数学题很简单，学生们很容易就能解出来。
The math problem is so easy and the students can solve it easily.
迈克尔，你能帮我解出这道数学题吗？
Michael, could you please help me work out this math problem?
如果老师不帮助我们，恐怕我们解不出这道数学题。
I'm afraid we can't work out the math problem unless the teacher helps us.
他们花了两天时间做这道数学题。
为什么不试试用别的办法做这道数学题呢？
为什么不试试用别的方法做这道数学题呢？
这道数学题我做了一个多小时，可是我解不出来。
I work at the math problem for over one hour, but I can't work it out.
如果你不知道如何计算出这道数学题，你可以从李雷那里得到帮助。
If you don't know how to work out the math problem, you can get help from li lei.
如果你不知道如何计算出这道数学题，你可以从李雷那里得到帮助。
If you don't know how to work out the math problem, you can get help from li lei.
应用推荐