When you ask "What number is halfway between 57 and 201?" 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=201.
To find the number halfway between 57 and 201, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 201 into our formula, we get:
(57 + 201)/2 = 129
Thus, the number halfway between 57 and 201 is 129.
To check that our answer is correct, we subtract 57 from 129 and subtract 129 from 201 and compare the two numbers:
129 - 57 = 72
201 - 129 = 72
As you can see, the halfway number is 72 higher than 57 and 72 lower than 201. Therefore, our halfway between answer of 129 above is correct.
Halfway Between
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Halfway Between 57 and 202
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