When you ask "What number is halfway between 63 and 87?" 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=87.
To find the number halfway between 63 and 87, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 87 into our formula, we get:
(63 + 87)/2 = 75
Thus, the number halfway between 63 and 87 is 75.
To check that our answer is correct, we subtract 63 from 75 and subtract 75 from 87 and compare the two numbers:
75 - 63 = 12
87 - 75 = 12
As you can see, the halfway number is 12 higher than 63 and 12 lower than 87. Therefore, our halfway between answer of 75 above is correct.
Halfway Between
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Halfway Between 63 and 88
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