When you ask "What number is halfway between 40 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=40 and Y=203.
To find the number halfway between 40 and 203, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 203 into our formula, we get:
(40 + 203)/2 = 121.5
Thus, the number halfway between 40 and 203 is 121.5.
To check that our answer is correct, we subtract 40 from 121.5 and subtract 121.5 from 203 and compare the two numbers:
121.5 - 40 = 81.5
203 - 121.5 = 81.5
As you can see, the halfway number is 81.5 higher than 40 and 81.5 lower than 203. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 40 and 204
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