When you ask "What number is halfway between 31 and 203?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=31 and Y=203.
To find the number halfway between 31 and 203, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 203 into our formula, we get:
(31 + 203)/2 = 117
Thus, the number halfway between 31 and 203 is 117.
To check that our answer is correct, we subtract 31 from 117 and subtract 117 from 203 and compare the two numbers:
117 - 31 = 86
203 - 117 = 86
As you can see, the halfway number is 86 higher than 31 and 86 lower than 203. Therefore, our halfway between answer of 117 above is correct.
Halfway Between
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Halfway Between 31 and 204
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