What plus 4 equals 40?

This is how to calculate "What plus 4 equals 40?" In other words, what do you add to 4 to get 40? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 4 = 40

To solve this equation, we first add -4 to each side of the equal sign like this:

What + 4 - 4 = 40 - 4

Then, we do the calculation to get the answer to "What plus 4 equals 40?" as follows:

What = 36

The answer to "What plus 4 equals 40?" is 36. You know this answer is correct because 36 plus 4 equals 40.

What Plus Calculator
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What plus 4 equals 41?
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