When you ask "What number is halfway between 79 and 517?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=79 and Y=517.
To find the number halfway between 79 and 517, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 517 into our formula, we get:
(79 + 517)/2 = 298
Thus, the number halfway between 79 and 517 is 298.
To check that our answer is correct, we subtract 79 from 298 and subtract 298 from 517 and compare the two numbers:
298 - 79 = 219
517 - 298 = 219
As you can see, the halfway number is 219 higher than 79 and 219 lower than 517. Therefore, our halfway between answer of 298 above is correct.
Halfway Between
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Halfway Between 79 and 518
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