When you ask "What number is halfway between 2 and 397?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=2 and Y=397.
To find the number halfway between 2 and 397, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 397 into our formula, we get:
(2 + 397)/2 = 199.5
Thus, the number halfway between 2 and 397 is 199.5.
To check that our answer is correct, we subtract 2 from 199.5 and subtract 199.5 from 397 and compare the two numbers:
199.5 - 2 = 197.5
397 - 199.5 = 197.5
As you can see, the halfway number is 197.5 higher than 2 and 197.5 lower than 397. Therefore, our halfway between answer of 199.5 above is correct.
Halfway Between
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Halfway Between 2 and 398
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