When you ask "What number is halfway between 17 and 51?" 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=51.
To find the number halfway between 17 and 51, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 51 into our formula, we get:
(17 + 51)/2 = 34
Thus, the number halfway between 17 and 51 is 34.
To check that our answer is correct, we subtract 17 from 34 and subtract 34 from 51 and compare the two numbers:
34 - 17 = 17
51 - 34 = 17
As you can see, the halfway number is 17 higher than 17 and 17 lower than 51. Therefore, our halfway between answer of 34 above is correct.
Halfway Between
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Halfway Between 17 and 52
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