When you ask "What number is halfway between 23 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=23 and Y=87.
To find the number halfway between 23 and 87, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 87 into our formula, we get:
(23 + 87)/2 = 55
Thus, the number halfway between 23 and 87 is 55.
To check that our answer is correct, we subtract 23 from 55 and subtract 55 from 87 and compare the two numbers:
55 - 23 = 32
87 - 55 = 32
As you can see, the halfway number is 32 higher than 23 and 32 lower than 87. Therefore, our halfway between answer of 55 above is correct.
Halfway Between
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Halfway Between 23 and 88
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