10) \( \sqrt{5}+\sqrt{5} \)

When you add \( \sqrt{5} + \sqrt{5} \), you're essentially combining like terms, just like you would with regular numbers. So, it simplifies to \( 2\sqrt{5} \). Imagine if you had two apples, both representing \( \sqrt{5} \); when you put them together, you simply say you have two of them! Another fun fact: the square root of 5 is an irrational number, approximately equal to 2.236. This means \( 2\sqrt{5} \) is also irrational, approximately around 4.472. In mathematics, coming across irrational numbers is like finding a hidden treasure in the world of numbers!