When you ask "What number is halfway between 7 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=7 and Y=123.
To find the number halfway between 7 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 123 into our formula, we get:
(7 + 123)/2 = 65
Thus, the number halfway between 7 and 123 is 65.
To check that our answer is correct, we subtract 7 from 65 and subtract 65 from 123 and compare the two numbers:
65 - 7 = 58
123 - 65 = 58
As you can see, the halfway number is 58 higher than 7 and 58 lower than 123. Therefore, our halfway between answer of 65 above is correct.
Halfway Between
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Halfway Between 7 and 124
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