When you ask "What number is halfway between 57 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=57 and Y=257.
To find the number halfway between 57 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 257 into our formula, we get:
(57 + 257)/2 = 157
Thus, the number halfway between 57 and 257 is 157.
To check that our answer is correct, we subtract 57 from 157 and subtract 157 from 257 and compare the two numbers:
157 - 57 = 100
257 - 157 = 100
As you can see, the halfway number is 100 higher than 57 and 100 lower than 257. Therefore, our halfway between answer of 157 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 57 and 258
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