When you ask "What number is halfway between 8 and 243?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=243.
To find the number halfway between 8 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 243 into our formula, we get:
(8 + 243)/2 = 125.5
Thus, the number halfway between 8 and 243 is 125.5.
To check that our answer is correct, we subtract 8 from 125.5 and subtract 125.5 from 243 and compare the two numbers:
125.5 - 8 = 117.5
243 - 125.5 = 117.5
As you can see, the halfway number is 117.5 higher than 8 and 117.5 lower than 243. Therefore, our halfway between answer of 125.5 above is correct.
Halfway Between
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Halfway Between 8 and 244
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