Math 10: Numbersssss

Workbook from my summer school

The very first lesson of "Grade Ten and Up" is... numbers.
Simple, huh? 1 is a real number, -2 is an integer, 8.4568751235486532541... is an irrational number.

I'm pretty sure you've reviewed this even before 10th grade, but here we go again.

Natural numbers: 1, 2, 3, 4, 5, 6...
Whole numbers: 0, 1, 2, 3...
Integers: -3, -2, -1, 0, 1, 2, 3...
Rational numbers: -5/9, -1/4, 0, 5.23, 9.999999...

Irrational numbers: pi, 89.4531254124..., √2...

Real numbers:  -3, -2, -1, -5/9, -1/4, 0, 1, 2, 3, 5.23, 9.999999...

*Basically rational numbers are either fractions, repeating or terminating decimals, while irrational numbers are the opposite.