When you ask "What number is halfway between 29 and 678?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=29 and Y=678.
To find the number halfway between 29 and 678, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 678 into our formula, we get:
(29 + 678)/2 = 353.5
Thus, the number halfway between 29 and 678 is 353.5.
To check that our answer is correct, we subtract 29 from 353.5 and subtract 353.5 from 678 and compare the two numbers:
353.5 - 29 = 324.5
678 - 353.5 = 324.5
As you can see, the halfway number is 324.5 higher than 29 and 324.5 lower than 678. Therefore, our halfway between answer of 353.5 above is correct.
Halfway Between
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Halfway Between 29 and 679
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