82 plus what equals 81?

This is how to calculate "82 plus what equals 81?" In other words, 82 plus a number equals 81. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

82 + what = 81

To solve this equation, we first add -82 to each side of the equal sign like this:

82 - 82 + what = 81 - 82

Then, we do the calculation to get the answer to "82 plus what equals 81?" as follows:

What = -1

The answer to "82 plus what equals 81?" is -1. You know this answer is correct because 82 plus -1 equals 81.

Plus What Equals Calculator
Here you can calculate a similar problem:

82 plus what equals 82?
Do you think you can solve a similar problem on your own? Try to figure out the next problem on our list and then go here to check the answer.