When you ask "What number is halfway between 68 and 869?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=68 and Y=869.
To find the number halfway between 68 and 869, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 869 into our formula, we get:
(68 + 869)/2 = 468.5
Thus, the number halfway between 68 and 869 is 468.5.
To check that our answer is correct, we subtract 68 from 468.5 and subtract 468.5 from 869 and compare the two numbers:
468.5 - 68 = 400.5
869 - 468.5 = 400.5
As you can see, the halfway number is 400.5 higher than 68 and 400.5 lower than 869. Therefore, our halfway between answer of 468.5 above is correct.
Halfway Between
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