How could you add -13 + 10? A Add 13 + 10, and keep the negative sign from the -13. B Add 13 + 10, and keep the positive sign from the 10. C Subtract 13 - 10, and keep the negative sign from the -13. D Subtract 13 - 10, and keep the positive sign from the 10.

Answer is C

Explanation-
Here’s an easier way to add negative numbers. Unlike adding positive numbers and positive numbers together and getting a larger positive number, do the opposite of what the symbol is telling you.

For example:
-12 + 9 = -4

Instead of adding, I subtract 12 and 9 to get to 4 but the reasons the four is a negative is because any number from 0 to any higher value is always considered a negative.

The answer of this question is 672 .