When you ask "What number is halfway between 36 and 123?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=36 and Y=123.
To find the number halfway between 36 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 36 and 123 into our formula, we get:
(36 + 123)/2 = 79.5
Thus, the number halfway between 36 and 123 is 79.5.
To check that our answer is correct, we subtract 36 from 79.5 and subtract 79.5 from 123 and compare the two numbers:
79.5 - 36 = 43.5
123 - 79.5 = 43.5
As you can see, the halfway number is 43.5 higher than 36 and 43.5 lower than 123. Therefore, our halfway between answer of 79.5 above is correct.
Halfway Between
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Halfway Between 36 and 124
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