Prerequisites: Addition

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:

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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.

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Subtraction is the inverse of addition, meaning that it is the opposite.