When you ask "What number is halfway between 81 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=81 and Y=343.
To find the number halfway between 81 and 343, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 343 into our formula, we get:
(81 + 343)/2 = 212
Thus, the number halfway between 81 and 343 is 212.
To check that our answer is correct, we subtract 81 from 212 and subtract 212 from 343 and compare the two numbers:
212 - 81 = 131
343 - 212 = 131
As you can see, the halfway number is 131 higher than 81 and 131 lower than 343. Therefore, our halfway between answer of 212 above is correct.
Halfway Between
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Halfway Between 81 and 344
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