When you ask "What number is halfway between 55 and 253?" 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=253.
To find the number halfway between 55 and 253, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 253 into our formula, we get:
(55 + 253)/2 = 154
Thus, the number halfway between 55 and 253 is 154.
To check that our answer is correct, we subtract 55 from 154 and subtract 154 from 253 and compare the two numbers:
154 - 55 = 99
253 - 154 = 99
As you can see, the halfway number is 99 higher than 55 and 99 lower than 253. Therefore, our halfway between answer of 154 above is correct.
Halfway Between
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Halfway Between 55 and 254
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