When you ask "What number is halfway between 7 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=7 and Y=618.
To find the number halfway between 7 and 618, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 618 into our formula, we get:
(7 + 618)/2 = 312.5
Thus, the number halfway between 7 and 618 is 312.5.
To check that our answer is correct, we subtract 7 from 312.5 and subtract 312.5 from 618 and compare the two numbers:
312.5 - 7 = 305.5
618 - 312.5 = 305.5
As you can see, the halfway number is 305.5 higher than 7 and 305.5 lower than 618. Therefore, our halfway between answer of 312.5 above is correct.
Halfway Between
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