When you ask "What number is halfway between 79 and 122?" 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=122.
To find the number halfway between 79 and 122, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 122 into our formula, we get:
(79 + 122)/2 = 100.5
Thus, the number halfway between 79 and 122 is 100.5.
To check that our answer is correct, we subtract 79 from 100.5 and subtract 100.5 from 122 and compare the two numbers:
100.5 - 79 = 21.5
122 - 100.5 = 21.5
As you can see, the halfway number is 21.5 higher than 79 and 21.5 lower than 122. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 79 and 123
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