When you ask "What number is halfway between 51 and 440?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=51 and Y=440.
To find the number halfway between 51 and 440, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 440 into our formula, we get:
(51 + 440)/2 = 245.5
Thus, the number halfway between 51 and 440 is 245.5.
To check that our answer is correct, we subtract 51 from 245.5 and subtract 245.5 from 440 and compare the two numbers:
245.5 - 51 = 194.5
440 - 245.5 = 194.5
As you can see, the halfway number is 194.5 higher than 51 and 194.5 lower than 440. Therefore, our halfway between answer of 245.5 above is correct.
Halfway Between
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Halfway Between 51 and 441
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