When you ask "What number is halfway between 28 and 321?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=321.
To find the number halfway between 28 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 321 into our formula, we get:
(28 + 321)/2 = 174.5
Thus, the number halfway between 28 and 321 is 174.5.
To check that our answer is correct, we subtract 28 from 174.5 and subtract 174.5 from 321 and compare the two numbers:
174.5 - 28 = 146.5
321 - 174.5 = 146.5
As you can see, the halfway number is 146.5 higher than 28 and 146.5 lower than 321. Therefore, our halfway between answer of 174.5 above is correct.
Halfway Between
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Halfway Between 28 and 322
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