When you ask "What number is halfway between 7 and 171?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=171.
To find the number halfway between 7 and 171, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 171 into our formula, we get:
(7 + 171)/2 = 89
Thus, the number halfway between 7 and 171 is 89.
To check that our answer is correct, we subtract 7 from 89 and subtract 89 from 171 and compare the two numbers:
89 - 7 = 82
171 - 89 = 82
As you can see, the halfway number is 82 higher than 7 and 82 lower than 171. Therefore, our halfway between answer of 89 above is correct.
Halfway Between
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Halfway Between 7 and 172
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