When you ask "What number is halfway between 79 and 279?" 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=279.
To find the number halfway between 79 and 279, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 279 into our formula, we get:
(79 + 279)/2 = 179
Thus, the number halfway between 79 and 279 is 179.
To check that our answer is correct, we subtract 79 from 179 and subtract 179 from 279 and compare the two numbers:
179 - 79 = 100
279 - 179 = 100
As you can see, the halfway number is 100 higher than 79 and 100 lower than 279. Therefore, our halfway between answer of 179 above is correct.
Halfway Between
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Halfway Between 79 and 280
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