When you ask "What number is halfway between 55 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=55 and Y=201.
To find the number halfway between 55 and 201, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 201 into our formula, we get:
(55 + 201)/2 = 128
Thus, the number halfway between 55 and 201 is 128.
To check that our answer is correct, we subtract 55 from 128 and subtract 128 from 201 and compare the two numbers:
128 - 55 = 73
201 - 128 = 73
As you can see, the halfway number is 73 higher than 55 and 73 lower than 201. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 55 and 202
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