When you ask "What number is halfway between 29 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=29 and Y=400.
To find the number halfway between 29 and 400, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 400 into our formula, we get:
(29 + 400)/2 = 214.5
Thus, the number halfway between 29 and 400 is 214.5.
To check that our answer is correct, we subtract 29 from 214.5 and subtract 214.5 from 400 and compare the two numbers:
214.5 - 29 = 185.5
400 - 214.5 = 185.5
As you can see, the halfway number is 185.5 higher than 29 and 185.5 lower than 400. Therefore, our halfway between answer of 214.5 above is correct.
Halfway Between
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Halfway Between 29 and 401
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