When you ask "What number is halfway between 61 and 84?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=61 and Y=84.
To find the number halfway between 61 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 61 and 84 into our formula, we get:
(61 + 84)/2 = 72.5
Thus, the number halfway between 61 and 84 is 72.5.
To check that our answer is correct, we subtract 61 from 72.5 and subtract 72.5 from 84 and compare the two numbers:
72.5 - 61 = 11.5
84 - 72.5 = 11.5
As you can see, the halfway number is 11.5 higher than 61 and 11.5 lower than 84. Therefore, our halfway between answer of 72.5 above is correct.
Halfway Between
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Halfway Between 61 and 85
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