Addition and subtraction are inverse functions.
A set of related addition-subtraction or multiplication-division sentences is a fact family.
they are inverse functions
They both include number and they use your head
who discovered addition and subtraction.
Addition is the inverse operation to subtraction.
definiton of addition and subtraction
Subtraction can be seen as the inverse operation to addition.
Subtraction is the addition of a negative number.
You don't. You can check addition with subtraction or subtraction with addition, since subtraction is the opposite of addition. Similary, you can check division with multiplication, or vice versa.
Addition is a sum and so is subtraction. So there's your answer!