On week 11 of math we reviewed all the units for our mid terms. One thing I forgot and had to review was how to catagorize numbers into groups from chapter 1.

R stands for real numbers which are all numbers including rational and irration numbers.

The Q with the line on too of it stands for irrational numbers which are also known as “ugly numbers”. They are numbers that cannot be written as a fraction.

Q stands for rational numbers. They are all the numbers that can be written as a fraction.

I stands for integers. They are all positive(whole) numbers including negative numbers.

W stands for whole numbers. Which are all positive natural numbers including 0.

N stands for natural numbers. They are all the positive numbers.