When you ask "What number is halfway between 11 and 215?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=215.
To find the number halfway between 11 and 215, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 215 into our formula, we get:
(11 + 215)/2 = 113
Thus, the number halfway between 11 and 215 is 113.
To check that our answer is correct, we subtract 11 from 113 and subtract 113 from 215 and compare the two numbers:
113 - 11 = 102
215 - 113 = 102
As you can see, the halfway number is 102 higher than 11 and 102 lower than 215. Therefore, our halfway between answer of 113 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 11 and 216
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