When you ask "What number is halfway between 56 and 557?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=56 and Y=557.
To find the number halfway between 56 and 557, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 557 into our formula, we get:
(56 + 557)/2 = 306.5
Thus, the number halfway between 56 and 557 is 306.5.
To check that our answer is correct, we subtract 56 from 306.5 and subtract 306.5 from 557 and compare the two numbers:
306.5 - 56 = 250.5
557 - 306.5 = 250.5
As you can see, the halfway number is 250.5 higher than 56 and 250.5 lower than 557. Therefore, our halfway between answer of 306.5 above is correct.
Halfway Between
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