When you ask "What number is halfway between 15 and 694?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=694.
To find the number halfway between 15 and 694, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 694 into our formula, we get:
(15 + 694)/2 = 354.5
Thus, the number halfway between 15 and 694 is 354.5.
To check that our answer is correct, we subtract 15 from 354.5 and subtract 354.5 from 694 and compare the two numbers:
354.5 - 15 = 339.5
694 - 354.5 = 339.5
As you can see, the halfway number is 339.5 higher than 15 and 339.5 lower than 694. Therefore, our halfway between answer of 354.5 above is correct.
Halfway Between
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Halfway Between 15 and 695
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