When you ask "What number is halfway between 55 and 918?" 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=918.
To find the number halfway between 55 and 918, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 918 into our formula, we get:
(55 + 918)/2 = 486.5
Thus, the number halfway between 55 and 918 is 486.5.
To check that our answer is correct, we subtract 55 from 486.5 and subtract 486.5 from 918 and compare the two numbers:
486.5 - 55 = 431.5
918 - 486.5 = 431.5
As you can see, the halfway number is 431.5 higher than 55 and 431.5 lower than 918. Therefore, our halfway between answer of 486.5 above is correct.
Halfway Between
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Halfway Between 55 and 919
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