When you ask "What number is halfway between 51 and 118?" 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=118.
To find the number halfway between 51 and 118, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 118 into our formula, we get:
(51 + 118)/2 = 84.5
Thus, the number halfway between 51 and 118 is 84.5.
To check that our answer is correct, we subtract 51 from 84.5 and subtract 84.5 from 118 and compare the two numbers:
84.5 - 51 = 33.5
118 - 84.5 = 33.5
As you can see, the halfway number is 33.5 higher than 51 and 33.5 lower than 118. Therefore, our halfway between answer of 84.5 above is correct.
Halfway Between
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Halfway Between 51 and 119
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