In our first unit of math we learned about prime numbers, and we found prime numbers from 1-200. That’s when we used our divisibility rules. We then reviewed the real number system, which we learned last year. We also reviewed what rational and irrational numbers are, and how to determine which is rational and what is irrational. If a number terminates or repeats, then it is a rational number. Fractions are also rational numbers. There are different sizes of infinity, which was pretty fascinating. We learned the names of the different parts of a radical are.