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How can a subtraction problem be turned into a addition problem?
When you have a negative number after the subtraction sign it turns in to addition. For example +7 - (-7) = 14 and (-7) - 7 = (-14)
Is subtraction and addition commutative and associative?
Addition: yes. Subtraction: only if you redefine it as an addition, for example 5 - 3 = 5 + (-3) = (-3) + 5 = -3 + 5. You might simply keep each number with its sign.
Why it happens in maths that addition and subtraction makes subtraction?
Ok i can see where you would have trouble with this. When i first started Algebra, i wasn't quite sure how this worked. Here are some examples: 2-+2=0 the subtraction sign cancels the addition out. (2-2 is the same thing) 2- -2= 4 the two subtraction signs make an addition sign. (2+2 is the same thing) I hope i could help you.
How addition and subtraction related?
Addition and subtraction are reverse operations.
How is addition relaked to subtraction?
Addition is the inverse operation to subtraction.
