When you ask "What number is halfway between 77 and 206?" 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=206.
To find the number halfway between 77 and 206, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 206 into our formula, we get:
(77 + 206)/2 = 141.5
Thus, the number halfway between 77 and 206 is 141.5.
To check that our answer is correct, we subtract 77 from 141.5 and subtract 141.5 from 206 and compare the two numbers:
141.5 - 77 = 64.5
206 - 141.5 = 64.5
As you can see, the halfway number is 64.5 higher than 77 and 64.5 lower than 206. Therefore, our halfway between answer of 141.5 above is correct.
Halfway Between
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Halfway Between 77 and 207
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