When you ask "What number is halfway between 69 and 618?" 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=618.
To find the number halfway between 69 and 618, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 618 into our formula, we get:
(69 + 618)/2 = 343.5
Thus, the number halfway between 69 and 618 is 343.5.
To check that our answer is correct, we subtract 69 from 343.5 and subtract 343.5 from 618 and compare the two numbers:
343.5 - 69 = 274.5
618 - 343.5 = 274.5
As you can see, the halfway number is 274.5 higher than 69 and 274.5 lower than 618. Therefore, our halfway between answer of 343.5 above is correct.
Halfway Between
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Halfway Between 69 and 619
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