When you ask "What number is halfway between 4 and 398?" 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=398.
To find the number halfway between 4 and 398, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 398 into our formula, we get:
(4 + 398)/2 = 201
Thus, the number halfway between 4 and 398 is 201.
To check that our answer is correct, we subtract 4 from 201 and subtract 201 from 398 and compare the two numbers:
201 - 4 = 197
398 - 201 = 197
As you can see, the halfway number is 197 higher than 4 and 197 lower than 398. Therefore, our halfway between answer of 201 above is correct.
Halfway Between
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Halfway Between 4 and 399
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