When you ask "What number is halfway between 18 and 343?" 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=343.
To find the number halfway between 18 and 343, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 343 into our formula, we get:
(18 + 343)/2 = 180.5
Thus, the number halfway between 18 and 343 is 180.5.
To check that our answer is correct, we subtract 18 from 180.5 and subtract 180.5 from 343 and compare the two numbers:
180.5 - 18 = 162.5
343 - 180.5 = 162.5
As you can see, the halfway number is 162.5 higher than 18 and 162.5 lower than 343. Therefore, our halfway between answer of 180.5 above is correct.
Halfway Between
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Halfway Between 18 and 344
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