When you ask "What number is halfway between 12 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=12 and Y=84.
To find the number halfway between 12 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 84 into our formula, we get:
(12 + 84)/2 = 48
Thus, the number halfway between 12 and 84 is 48.
To check that our answer is correct, we subtract 12 from 48 and subtract 48 from 84 and compare the two numbers:
48 - 12 = 36
84 - 48 = 36
As you can see, the halfway number is 36 higher than 12 and 36 lower than 84. Therefore, our halfway between answer of 48 above is correct.
Halfway Between
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Halfway Between 12 and 85
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