When you ask "What number is halfway between 18 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=18 and Y=266.
To find the number halfway between 18 and 266, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 266 into our formula, we get:
(18 + 266)/2 = 142
Thus, the number halfway between 18 and 266 is 142.
To check that our answer is correct, we subtract 18 from 142 and subtract 142 from 266 and compare the two numbers:
142 - 18 = 124
266 - 142 = 124
As you can see, the halfway number is 124 higher than 18 and 124 lower than 266. Therefore, our halfway between answer of 142 above is correct.
Halfway Between
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Halfway Between 18 and 267
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