When you ask "What number is halfway between 72 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=72 and Y=206.
To find the number halfway between 72 and 206, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 72 and 206 into our formula, we get:
(72 + 206)/2 = 139
Thus, the number halfway between 72 and 206 is 139.
To check that our answer is correct, we subtract 72 from 139 and subtract 139 from 206 and compare the two numbers:
139 - 72 = 67
206 - 139 = 67
As you can see, the halfway number is 67 higher than 72 and 67 lower than 206. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 72 and 207
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