When you ask "What number is halfway between 11 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=11 and Y=170.
To find the number halfway between 11 and 170, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 170 into our formula, we get:
(11 + 170)/2 = 90.5
Thus, the number halfway between 11 and 170 is 90.5.
To check that our answer is correct, we subtract 11 from 90.5 and subtract 90.5 from 170 and compare the two numbers:
90.5 - 11 = 79.5
170 - 90.5 = 79.5
As you can see, the halfway number is 79.5 higher than 11 and 79.5 lower than 170. Therefore, our halfway between answer of 90.5 above is correct.
Halfway Between
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Halfway Between 11 and 171
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