When you ask "What number is halfway between 50 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=50 and Y=121.
To find the number halfway between 50 and 121, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 121 into our formula, we get:
(50 + 121)/2 = 85.5
Thus, the number halfway between 50 and 121 is 85.5.
To check that our answer is correct, we subtract 50 from 85.5 and subtract 85.5 from 121 and compare the two numbers:
85.5 - 50 = 35.5
121 - 85.5 = 35.5
As you can see, the halfway number is 35.5 higher than 50 and 35.5 lower than 121. Therefore, our halfway between answer of 85.5 above is correct.
Halfway Between
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Halfway Between 50 and 122
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