When you ask "What number is halfway between 16 and 257?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=16 and Y=257.
To find the number halfway between 16 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 257 into our formula, we get:
(16 + 257)/2 = 136.5
Thus, the number halfway between 16 and 257 is 136.5.
To check that our answer is correct, we subtract 16 from 136.5 and subtract 136.5 from 257 and compare the two numbers:
136.5 - 16 = 120.5
257 - 136.5 = 120.5
As you can see, the halfway number is 120.5 higher than 16 and 120.5 lower than 257. Therefore, our halfway between answer of 136.5 above is correct.
Halfway Between
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Halfway Between 16 and 258
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