to understand, first we need to know what an integer is
an integer is like -4,-3,-2,-1,0,1,2,3,4. so counting number and 0 and the negatives, no fractions or decimals
rational numbers are number that can be written in form [tex]\frac{a}{b}[/tex] where a and b are integers and b≠0
some examples of rational numbers are -4=-4/1, 1/2, 0.5=1/2, 0.3333333333333333=1/3, etc
irrational numbers are number that can't be written in form [tex]\frac{a}{b}[/tex] where a and b are integers and b≠0
some examples are π and √2
