55 plus what equals 60?

This is how to calculate "55 plus what equals 60?" In other words, 55 plus a number equals 60. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

55 + what = 60

To solve this equation, we first add -55 to each side of the equal sign like this:

55 - 55 + what = 60 - 55

Then, we do the calculation to get the answer to "55 plus what equals 60?" as follows:

What = 5

The answer to "55 plus what equals 60?" is 5. You know this answer is correct because 55 plus 5 equals 60.

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55 plus what equals 61?
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