Monster Math- Zombies and Negative Numbers

It’s been a while, but Monster Math is back and it's coming to get you, Martha!  Today, we will be battling the number apocalypse with :

NEGATIVE NUMBERS - Zombies and Survivors

First of all we have two teams, positive numbers, which are represented by living humans, or survivors, and negative numbers, which are then, obviously, the undead, zeds, zombies.

positive numbers                      negative numbers

ADDITION

Let’s start with an addition word problem. Addition with negative numbers is just comparing, canceling, and letting the bodies fall as they will.

We have seven humans, hiding out in a rickety old warehouse, with a surprisingly large arsenal of shotguns and buckshot.  Five ambling undead come stumbling out of the local cemetery that has been rained upon by an unknown chemical that reanimates corpses, most likely created by the government as a chemical warfare agent. Who will survive the inevitable fight?

This would be represented as 7+ -5.

Now, our humans are not trained in combat at all, and whether they are or not, to fit the plot of the math problem, we know that they are incredibly bad at fighting zombies and anyone who kills a zombie ends up getting bitten and must die.  As in real life, if there is a zombie attack, it is best to hide and stay out of it, but alas, these are brave, if not foolhardy,  little positive humans and so, they are jumping right into this fight.