When you ask "What number is halfway between 69 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=69 and Y=869.
To find the number halfway between 69 and 869, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 869 into our formula, we get:
(69 + 869)/2 = 469
Thus, the number halfway between 69 and 869 is 469.
To check that our answer is correct, we subtract 69 from 469 and subtract 469 from 869 and compare the two numbers:
469 - 69 = 400
869 - 469 = 400
As you can see, the halfway number is 400 higher than 69 and 400 lower than 869. Therefore, our halfway between answer of 469 above is correct.
Halfway Between
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