When you ask "What number is halfway between 55 and 668?" 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=668.
To find the number halfway between 55 and 668, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 668 into our formula, we get:
(55 + 668)/2 = 361.5
Thus, the number halfway between 55 and 668 is 361.5.
To check that our answer is correct, we subtract 55 from 361.5 and subtract 361.5 from 668 and compare the two numbers:
361.5 - 55 = 306.5
668 - 361.5 = 306.5
As you can see, the halfway number is 306.5 higher than 55 and 306.5 lower than 668. Therefore, our halfway between answer of 361.5 above is correct.
Halfway Between
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Halfway Between 55 and 669
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