When you ask "What number is halfway between 3 and 556?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=556.
To find the number halfway between 3 and 556, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 556 into our formula, we get:
(3 + 556)/2 = 279.5
Thus, the number halfway between 3 and 556 is 279.5.
To check that our answer is correct, we subtract 3 from 279.5 and subtract 279.5 from 556 and compare the two numbers:
279.5 - 3 = 276.5
556 - 279.5 = 276.5
As you can see, the halfway number is 276.5 higher than 3 and 276.5 lower than 556. Therefore, our halfway between answer of 279.5 above is correct.
Halfway Between
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Halfway Between 3 and 557
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