When you ask "What number is halfway between 17 and 378?" 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=378.
To find the number halfway between 17 and 378, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 378 into our formula, we get:
(17 + 378)/2 = 197.5
Thus, the number halfway between 17 and 378 is 197.5.
To check that our answer is correct, we subtract 17 from 197.5 and subtract 197.5 from 378 and compare the two numbers:
197.5 - 17 = 180.5
378 - 197.5 = 180.5
As you can see, the halfway number is 180.5 higher than 17 and 180.5 lower than 378. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 17 and 379
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