When you ask "What number is halfway between 3 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=3 and Y=397.
To find the number halfway between 3 and 397, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 397 into our formula, we get:
(3 + 397)/2 = 200
Thus, the number halfway between 3 and 397 is 200.
To check that our answer is correct, we subtract 3 from 200 and subtract 200 from 397 and compare the two numbers:
200 - 3 = 197
397 - 200 = 197
As you can see, the halfway number is 197 higher than 3 and 197 lower than 397. Therefore, our halfway between answer of 200 above is correct.
Halfway Between
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Halfway Between 3 and 398
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