When you ask "What number is halfway between 18 and 695?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=695.
To find the number halfway between 18 and 695, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 695 into our formula, we get:
(18 + 695)/2 = 356.5
Thus, the number halfway between 18 and 695 is 356.5.
To check that our answer is correct, we subtract 18 from 356.5 and subtract 356.5 from 695 and compare the two numbers:
356.5 - 18 = 338.5
695 - 356.5 = 338.5
As you can see, the halfway number is 338.5 higher than 18 and 338.5 lower than 695. Therefore, our halfway between answer of 356.5 above is correct.
Halfway Between
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Halfway Between 18 and 696
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