When you ask "What number is halfway between 79 and 130?" 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=130.
To find the number halfway between 79 and 130, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 130 into our formula, we get:
(79 + 130)/2 = 104.5
Thus, the number halfway between 79 and 130 is 104.5.
To check that our answer is correct, we subtract 79 from 104.5 and subtract 104.5 from 130 and compare the two numbers:
104.5 - 79 = 25.5
130 - 104.5 = 25.5
As you can see, the halfway number is 25.5 higher than 79 and 25.5 lower than 130. Therefore, our halfway between answer of 104.5 above is correct.
Halfway Between
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Halfway Between 79 and 131
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