ELI5: Explain Like I'm 5

Pure mathematics

Pure mathematics is a way for us to use our imagination to explore numbers and shapes. We use math to explain the world around us and solve problems. When we do pure mathematics, we don't worry about how it connects to the real world. Instead, we focus on exploring questions we can answer using math equations. We also use pure math to come up with new ways to express ideas, like using the Pythagorean Theorem to figure out how long a side of a triangle is. Pure math helps us practice our problem-solving skills and understand how numbers and shapes work together.
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