When you ask "What number is halfway between 84 and 438?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=438.
To find the number halfway between 84 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 438 into our formula, we get:
(84 + 438)/2 = 261
Thus, the number halfway between 84 and 438 is 261.
To check that our answer is correct, we subtract 84 from 261 and subtract 261 from 438 and compare the two numbers:
261 - 84 = 177
438 - 261 = 177
As you can see, the halfway number is 177 higher than 84 and 177 lower than 438. Therefore, our halfway between answer of 261 above is correct.
Halfway Between
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Halfway Between 84 and 439
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