When you ask "What number is halfway between 17 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=17 and Y=387.
To find the number halfway between 17 and 387, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 387 into our formula, we get:
(17 + 387)/2 = 202
Thus, the number halfway between 17 and 387 is 202.
To check that our answer is correct, we subtract 17 from 202 and subtract 202 from 387 and compare the two numbers:
202 - 17 = 185
387 - 202 = 185
As you can see, the halfway number is 185 higher than 17 and 185 lower than 387. Therefore, our halfway between answer of 202 above is correct.
Halfway Between
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Halfway Between 17 and 388
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