When you ask "What number is halfway between 69 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=69 and Y=215.
To find the number halfway between 69 and 215, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 215 into our formula, we get:
(69 + 215)/2 = 142
Thus, the number halfway between 69 and 215 is 142.
To check that our answer is correct, we subtract 69 from 142 and subtract 142 from 215 and compare the two numbers:
142 - 69 = 73
215 - 142 = 73
As you can see, the halfway number is 73 higher than 69 and 73 lower than 215. Therefore, our halfway between answer of 142 above is correct.
Halfway Between
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