When you ask "What number is halfway between 0 and 399?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=0 and Y=399.
To find the number halfway between 0 and 399, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 399 into our formula, we get:
(0 + 399)/2 = 199.5
Thus, the number halfway between 0 and 399 is 199.5.
To check that our answer is correct, we subtract 0 from 199.5 and subtract 199.5 from 399 and compare the two numbers:
199.5 - 0 = 199.5
399 - 199.5 = 199.5
As you can see, the halfway number is 199.5 higher than 0 and 199.5 lower than 399. Therefore, our halfway between answer of 199.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 0 and 400
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