When you ask "What number is halfway between 22 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=22 and Y=321.
To find the number halfway between 22 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 22 and 321 into our formula, we get:
(22 + 321)/2 = 171.5
Thus, the number halfway between 22 and 321 is 171.5.
To check that our answer is correct, we subtract 22 from 171.5 and subtract 171.5 from 321 and compare the two numbers:
171.5 - 22 = 149.5
321 - 171.5 = 149.5
As you can see, the halfway number is 149.5 higher than 22 and 149.5 lower than 321. Therefore, our halfway between answer of 171.5 above is correct.
Halfway Between
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Halfway Between 22 and 322
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