How do you do the problem -4-9

rewrite the problem like this:

-4+(-9)=?

Look at it this way: if you have money, it's a positive number and if you owe money, it's a negative number. You owe $4, you owe $9..do you owe money or have money? That tells you your sign. How much?

To solve the problem -4 - 9, you need to follow these steps:

1. Start by subtracting 9 from -4. When subtracting a positive number, you can treat it as adding the negative value.
-4 + (-9) = -13

So, -4 - 9 equals -13.