When you ask "What number is halfway between 51 and 115?" 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=115.
To find the number halfway between 51 and 115, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 115 into our formula, we get:
(51 + 115)/2 = 83
Thus, the number halfway between 51 and 115 is 83.
To check that our answer is correct, we subtract 51 from 83 and subtract 83 from 115 and compare the two numbers:
83 - 51 = 32
115 - 83 = 32
As you can see, the halfway number is 32 higher than 51 and 32 lower than 115. Therefore, our halfway between answer of 83 above is correct.
Halfway Between
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Halfway Between 51 and 116
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