If your job is a bank teller when you grow up you need to count peoples money. Also jobs like these: accountants, cashiers and food servers. I really don't know much but hope this helps!
Well, if you need 5 bananas and there’s 10 you only take 5 (subtract) say you need 3 lemons in a recipe but you only have 2. you go to the grocery store and get another one (adding). i don’t know if this is the answer ur look for but hope it helps.
