When you ask "What number is halfway between 69 and 387?" 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=387.
To find the number halfway between 69 and 387, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 387 into our formula, we get:
(69 + 387)/2 = 228
Thus, the number halfway between 69 and 387 is 228.
To check that our answer is correct, we subtract 69 from 228 and subtract 228 from 387 and compare the two numbers:
228 - 69 = 159
387 - 228 = 159
As you can see, the halfway number is 159 higher than 69 and 159 lower than 387. Therefore, our halfway between answer of 228 above is correct.
Halfway Between
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Halfway Between 69 and 388
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