When you ask "What number is halfway between 4 and 843?" 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=843.
To find the number halfway between 4 and 843, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 843 into our formula, we get:
(4 + 843)/2 = 423.5
Thus, the number halfway between 4 and 843 is 423.5.
To check that our answer is correct, we subtract 4 from 423.5 and subtract 423.5 from 843 and compare the two numbers:
423.5 - 4 = 419.5
843 - 423.5 = 419.5
As you can see, the halfway number is 419.5 higher than 4 and 419.5 lower than 843. Therefore, our halfway between answer of 423.5 above is correct.
Halfway Between
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Halfway Between 4 and 844
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