When you ask "What number is halfway between 77 and 166?" 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=166.
To find the number halfway between 77 and 166, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 166 into our formula, we get:
(77 + 166)/2 = 121.5
Thus, the number halfway between 77 and 166 is 121.5.
To check that our answer is correct, we subtract 77 from 121.5 and subtract 121.5 from 166 and compare the two numbers:
121.5 - 77 = 44.5
166 - 121.5 = 44.5
As you can see, the halfway number is 44.5 higher than 77 and 44.5 lower than 166. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 77 and 167
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