When you ask "What number is halfway between 65 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=65 and Y=213.
To find the number halfway between 65 and 213, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 65 and 213 into our formula, we get:
(65 + 213)/2 = 139
Thus, the number halfway between 65 and 213 is 139.
To check that our answer is correct, we subtract 65 from 139 and subtract 139 from 213 and compare the two numbers:
139 - 65 = 74
213 - 139 = 74
As you can see, the halfway number is 74 higher than 65 and 74 lower than 213. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 65 and 214
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