When you ask "What number is halfway between 43 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=43 and Y=123.
To find the number halfway between 43 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 43 and 123 into our formula, we get:
(43 + 123)/2 = 83
Thus, the number halfway between 43 and 123 is 83.
To check that our answer is correct, we subtract 43 from 83 and subtract 83 from 123 and compare the two numbers:
83 - 43 = 40
123 - 83 = 40
As you can see, the halfway number is 40 higher than 43 and 40 lower than 123. Therefore, our halfway between answer of 83 above is correct.
Halfway Between
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Halfway Between 43 and 124
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