When you ask "What number is halfway between 47 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=47 and Y=121.
To find the number halfway between 47 and 121, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 121 into our formula, we get:
(47 + 121)/2 = 84
Thus, the number halfway between 47 and 121 is 84.
To check that our answer is correct, we subtract 47 from 84 and subtract 84 from 121 and compare the two numbers:
84 - 47 = 37
121 - 84 = 37
As you can see, the halfway number is 37 higher than 47 and 37 lower than 121. Therefore, our halfway between answer of 84 above is correct.
Halfway Between
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Halfway Between 47 and 122
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