
When you ask "What number is halfway between 71 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=71 and Y=321.

To find the number halfway between 71 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 321 into our formula, we get:
(71 + 321)/2 = 196
Thus, the number halfway between 71 and 321 is 196.
To check that our answer is correct, we subtract 71 from 196 and subtract 196 from 321 and compare the two numbers:
196 - 71 = 125
321 - 196 = 125
As you can see, the halfway number is 125 higher than 71 and 125 lower than 321. Therefore, our halfway between answer of 196 above is correct.
Halfway Between
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Halfway Between 71 and 322
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