4 sentences

1. 我以为你算术不错呢。

   wǒ yǐ​wéi nǐ suàn​shù bù​cuò ne.

   I thought you were good at math.

   Source: OpenSubtitles

2. 算术让我疑惑不解。

   suàn​shù ràng wǒ yí​huò bù​jiě.

   Arithmetic puzzles me.

   Source: OpenSubtitles

3. 谁教你算术的？

   shéi jiāo nǐ suàn​shù de?

   Who taught you arithmetic?

   Source: OpenSubtitles

4. 你的身体比一道简单的算术题要复杂得多。

   nǐ de shēn​tǐ bǐ yī​dào jiǎn​dān de suàn​shù tí yào fù​zá de duō.

   Your body is much more complex than a simple math problem.

   Source: CCMatrix