When you ask "What number is halfway between 55 and 170?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=170.
To find the number halfway between 55 and 170, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 170 into our formula, we get:
(55 + 170)/2 = 112.5
Thus, the number halfway between 55 and 170 is 112.5.
To check that our answer is correct, we subtract 55 from 112.5 and subtract 112.5 from 170 and compare the two numbers:
112.5 - 55 = 57.5
170 - 112.5 = 57.5
As you can see, the halfway number is 57.5 higher than 55 and 57.5 lower than 170. Therefore, our halfway between answer of 112.5 above is correct.
Halfway Between
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Halfway Between 55 and 171
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