
When you ask "What number is halfway between 71 and 345?" 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=345.

To find the number halfway between 71 and 345, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 345 into our formula, we get:
(71 + 345)/2 = 208
Thus, the number halfway between 71 and 345 is 208.
To check that our answer is correct, we subtract 71 from 208 and subtract 208 from 345 and compare the two numbers:
208 - 71 = 137
345 - 208 = 137
As you can see, the halfway number is 137 higher than 71 and 137 lower than 345. Therefore, our halfway between answer of 208 above is correct.
Halfway Between
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Halfway Between 71 and 346
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