When you ask "What number is halfway between 79 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=79 and Y=438.
To find the number halfway between 79 and 438, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 438 into our formula, we get:
(79 + 438)/2 = 258.5
Thus, the number halfway between 79 and 438 is 258.5.
To check that our answer is correct, we subtract 79 from 258.5 and subtract 258.5 from 438 and compare the two numbers:
258.5 - 79 = 179.5
438 - 258.5 = 179.5
As you can see, the halfway number is 179.5 higher than 79 and 179.5 lower than 438. Therefore, our halfway between answer of 258.5 above is correct.
Halfway Between
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Halfway Between 79 and 439
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