When you ask "What number is halfway between 57 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=57 and Y=84.
To find the number halfway between 57 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 57 and 84 into our formula, we get:
(57 + 84)/2 = 70.5
Thus, the number halfway between 57 and 84 is 70.5.
To check that our answer is correct, we subtract 57 from 70.5 and subtract 70.5 from 84 and compare the two numbers:
70.5 - 57 = 13.5
84 - 70.5 = 13.5
As you can see, the halfway number is 13.5 higher than 57 and 13.5 lower than 84. Therefore, our halfway between answer of 70.5 above is correct.
Halfway Between
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Halfway Between 57 and 85
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