When you ask "What number is halfway between 69 and 400?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=400.
To find the number halfway between 69 and 400, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 400 into our formula, we get:
(69 + 400)/2 = 234.5
Thus, the number halfway between 69 and 400 is 234.5.
To check that our answer is correct, we subtract 69 from 234.5 and subtract 234.5 from 400 and compare the two numbers:
234.5 - 69 = 165.5
400 - 234.5 = 165.5
As you can see, the halfway number is 165.5 higher than 69 and 165.5 lower than 400. Therefore, our halfway between answer of 234.5 above is correct.
Halfway Between
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Halfway Between 69 and 401
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