When you ask "What number is halfway between 79 and 520?" 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=520.
To find the number halfway between 79 and 520, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 520 into our formula, we get:
(79 + 520)/2 = 299.5
Thus, the number halfway between 79 and 520 is 299.5.
To check that our answer is correct, we subtract 79 from 299.5 and subtract 299.5 from 520 and compare the two numbers:
299.5 - 79 = 220.5
520 - 299.5 = 220.5
As you can see, the halfway number is 220.5 higher than 79 and 220.5 lower than 520. Therefore, our halfway between answer of 299.5 above is correct.
Halfway Between
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Halfway Between 79 and 521
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