When you ask "What number is halfway between 63 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=63 and Y=84.
To find the number halfway between 63 and 84, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 84 into our formula, we get:
(63 + 84)/2 = 73.5
Thus, the number halfway between 63 and 84 is 73.5.
To check that our answer is correct, we subtract 63 from 73.5 and subtract 73.5 from 84 and compare the two numbers:
73.5 - 63 = 10.5
84 - 73.5 = 10.5
As you can see, the halfway number is 10.5 higher than 63 and 10.5 lower than 84. Therefore, our halfway between answer of 73.5 above is correct.
Halfway Between
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Halfway Between 63 and 85
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