Natural Numbers are first they are numbers that we use everyday like 1,2,3,4,5,6,7
Then it is Whole Numbers 0 and Natural numbers.
Then Itegers which are Whole Numbers and their opposites eg. -3,-2,-1,0,1,2,3
Then it Rational Numbers itegers that can be expressed as fractions.
After that Irrational numbers, numbers that can't be expressed as fractions. Eg PI.
Ok so, I hope i covered some major things.