When you ask "What number is halfway between 20 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=20 and Y=343.
To find the number halfway between 20 and 343, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 343 into our formula, we get:
(20 + 343)/2 = 181.5
Thus, the number halfway between 20 and 343 is 181.5.
To check that our answer is correct, we subtract 20 from 181.5 and subtract 181.5 from 343 and compare the two numbers:
181.5 - 20 = 161.5
343 - 181.5 = 161.5
As you can see, the halfway number is 161.5 higher than 20 and 161.5 lower than 343. Therefore, our halfway between answer of 181.5 above is correct.
Halfway Between
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Halfway Between 20 and 344
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