Subtraction deals with the taking away of numbers, like number a from number b so that: a >= b while b > a. Such a case is with:
a = 36 and b = 5.
So a - b = 36-５ = 31, a >= b is true.
a>=b, like .
But b>a, for example : .
a = 36 and b = 55.
Subtraction is the inverse of addition, meaning that it is the opposite.