When you ask "What number is halfway between 13 and 245?" 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=245.
To find the number halfway between 13 and 245, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 13 and 245 into our formula, we get:
(13 + 245)/2 = 129
Thus, the number halfway between 13 and 245 is 129.
To check that our answer is correct, we subtract 13 from 129 and subtract 129 from 245 and compare the two numbers:
129 - 13 = 116
245 - 129 = 116
As you can see, the halfway number is 116 higher than 13 and 116 lower than 245. Therefore, our halfway between answer of 129 above is correct.
Halfway Between
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Halfway Between 13 and 246
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