When you ask "What number is halfway between 11 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=11 and Y=245.
To find the number halfway between 11 and 245, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 245 into our formula, we get:
(11 + 245)/2 = 128
Thus, the number halfway between 11 and 245 is 128.
To check that our answer is correct, we subtract 11 from 128 and subtract 128 from 245 and compare the two numbers:
128 - 11 = 117
245 - 128 = 117
As you can see, the halfway number is 117 higher than 11 and 117 lower than 245. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 11 and 246
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