When you ask "What number is halfway between 4 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=4 and Y=243.
To find the number halfway between 4 and 243, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 243 into our formula, we get:
(4 + 243)/2 = 123.5
Thus, the number halfway between 4 and 243 is 123.5.
To check that our answer is correct, we subtract 4 from 123.5 and subtract 123.5 from 243 and compare the two numbers:
123.5 - 4 = 119.5
243 - 123.5 = 119.5
As you can see, the halfway number is 119.5 higher than 4 and 119.5 lower than 243. Therefore, our halfway between answer of 123.5 above is correct.
Halfway Between
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Halfway Between 4 and 244
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