When you ask "What number is halfway between 12 and 266?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=12 and Y=266.
To find the number halfway between 12 and 266, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 266 into our formula, we get:
(12 + 266)/2 = 139
Thus, the number halfway between 12 and 266 is 139.
To check that our answer is correct, we subtract 12 from 139 and subtract 139 from 266 and compare the two numbers:
139 - 12 = 127
266 - 139 = 127
As you can see, the halfway number is 127 higher than 12 and 127 lower than 266. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 12 and 267
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