When you ask "What number is halfway between 13 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=13 and Y=130.
To find the number halfway between 13 and 130, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 130 into our formula, we get:
(13 + 130)/2 = 71.5
Thus, the number halfway between 13 and 130 is 71.5.
To check that our answer is correct, we subtract 13 from 71.5 and subtract 71.5 from 130 and compare the two numbers:
71.5 - 13 = 58.5
130 - 71.5 = 58.5
As you can see, the halfway number is 58.5 higher than 13 and 58.5 lower than 130. Therefore, our halfway between answer of 71.5 above is correct.
Halfway Between
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Halfway Between 13 and 131
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