When you ask "What number is halfway between 89 and 102?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=89 and Y=102.
To find the number halfway between 89 and 102, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 89 and 102 into our formula, we get:
(89 + 102)/2 = 95.5
Thus, the number halfway between 89 and 102 is 95.5.
To check that our answer is correct, we subtract 89 from 95.5 and subtract 95.5 from 102 and compare the two numbers:
95.5 - 89 = 6.5
102 - 95.5 = 6.5
As you can see, the halfway number is 6.5 higher than 89 and 6.5 lower than 102. Therefore, our halfway between answer of 95.5 above is correct.
Halfway Between
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Halfway Between 89 and 103
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