When you ask "What number is halfway between 18 and 838?" 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=838.
To find the number halfway between 18 and 838, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 838 into our formula, we get:
(18 + 838)/2 = 428
Thus, the number halfway between 18 and 838 is 428.
To check that our answer is correct, we subtract 18 from 428 and subtract 428 from 838 and compare the two numbers:
428 - 18 = 410
838 - 428 = 410
As you can see, the halfway number is 410 higher than 18 and 410 lower than 838. Therefore, our halfway between answer of 428 above is correct.
Halfway Between
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Halfway Between 18 and 839
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