When you ask "What number is halfway between 51 and 254?" 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=254.
To find the number halfway between 51 and 254, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 254 into our formula, we get:
(51 + 254)/2 = 152.5
Thus, the number halfway between 51 and 254 is 152.5.
To check that our answer is correct, we subtract 51 from 152.5 and subtract 152.5 from 254 and compare the two numbers:
152.5 - 51 = 101.5
254 - 152.5 = 101.5
As you can see, the halfway number is 101.5 higher than 51 and 101.5 lower than 254. Therefore, our halfway between answer of 152.5 above is correct.
Halfway Between
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Halfway Between 51 and 255
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