When you ask "What number is halfway between 71 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=71 and Y=206.
To find the number halfway between 71 and 206, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 206 into our formula, we get:
(71 + 206)/2 = 138.5
Thus, the number halfway between 71 and 206 is 138.5.
To check that our answer is correct, we subtract 71 from 138.5 and subtract 138.5 from 206 and compare the two numbers:
138.5 - 71 = 67.5
206 - 138.5 = 67.5
As you can see, the halfway number is 67.5 higher than 71 and 67.5 lower than 206. Therefore, our halfway between answer of 138.5 above is correct.
Halfway Between
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Halfway Between 71 and 207
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