我需要买一本新的数学书。

I need to buy a new math book.

这本数学书很难理解。

This math book is hard to understand.

她每天晚上都读数学书。

She reads her math book every night.

我们在图书馆找到了那本数学书。

We found the math book in the library.

他的数学书丢了。

He lost his math book.

我有两本书，一本是数学书，其它是英语书。

I have two books, one is a math book, the other is an English book.

英语书，语文书，数学书…

English book, Chinese book, math book…

我找到了我的数学书。

I find my math book.

把你的数学书放到拼写书上.

Put your math book on your spelling book.

为什么数学书很心烦?

Why was the math book upset?