When you ask "What number is halfway between 34 and 121?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=34 and Y=121.
To find the number halfway between 34 and 121, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 34 and 121 into our formula, we get:
(34 + 121)/2 = 77.5
Thus, the number halfway between 34 and 121 is 77.5.
To check that our answer is correct, we subtract 34 from 77.5 and subtract 77.5 from 121 and compare the two numbers:
77.5 - 34 = 43.5
121 - 77.5 = 43.5
As you can see, the halfway number is 43.5 higher than 34 and 43.5 lower than 121. Therefore, our halfway between answer of 77.5 above is correct.
Halfway Between
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Halfway Between 34 and 122
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