加

In a sentence

• 我想加一些糖到咖啡里。

  I would like to add some sugar to the coffee.

  Here, "加" means "add" to indicate the action of putting something additional into a mix.

• 冬天到了，我们需要加衣服保暖。

  Winter has arrived; we need to wear more layers to keep warm.

  In this sentence, "加" is used to mean "add more," referring to increasing or supplementing quantity.

• 这个数学题很简单，只需要加法。

  This math problem is very simple; it only requires addition.

  Here, "加" is used in the mathematical sense of addition, indicating the operation of summing numbers.