When you ask "What number is halfway between 54 and 213?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=54 and Y=213.
To find the number halfway between 54 and 213, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 54 and 213 into our formula, we get:
(54 + 213)/2 = 133.5
Thus, the number halfway between 54 and 213 is 133.5.
To check that our answer is correct, we subtract 54 from 133.5 and subtract 133.5 from 213 and compare the two numbers:
133.5 - 54 = 79.5
213 - 133.5 = 79.5
As you can see, the halfway number is 79.5 higher than 54 and 79.5 lower than 213. Therefore, our halfway between answer of 133.5 above is correct.
Halfway Between
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Halfway Between 54 and 214
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