When you ask "What number is halfway between 18 and 670?" 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=670.
To find the number halfway between 18 and 670, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 670 into our formula, we get:
(18 + 670)/2 = 344
Thus, the number halfway between 18 and 670 is 344.
To check that our answer is correct, we subtract 18 from 344 and subtract 344 from 670 and compare the two numbers:
344 - 18 = 326
670 - 344 = 326
As you can see, the halfway number is 326 higher than 18 and 326 lower than 670. Therefore, our halfway between answer of 344 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 18 and 671
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