When you ask "What number is halfway between 77 and 187?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=187.
To find the number halfway between 77 and 187, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 187 into our formula, we get:
(77 + 187)/2 = 132
Thus, the number halfway between 77 and 187 is 132.
To check that our answer is correct, we subtract 77 from 132 and subtract 132 from 187 and compare the two numbers:
132 - 77 = 55
187 - 132 = 55
As you can see, the halfway number is 55 higher than 77 and 55 lower than 187. Therefore, our halfway between answer of 132 above is correct.
Halfway Between
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Halfway Between 77 and 188
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