Needing a real life example of the use of integers

Question

So i’m trying to understand more about math. For the operation – – = +, what would be a real life example of me meeting with that situation?

Thank you!

In: 0

Answer 1

Here’s an example. Suppose you have a cup of water that’s gradually evaporating. It has 100 grams of water now, and it’s losing 10 grams per hour. How much water did it have 1 hour ago?

One way of expressing that mathematically is 100 – (-10). And I think it makes intuitive sense that if the cup is losing water over time, then in the past it had more water than it has now.