When you ask "What number is halfway between 60 and 99?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=60 and Y=99.
To find the number halfway between 60 and 99, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 60 and 99 into our formula, we get:
(60 + 99)/2 = 79.5
Thus, the number halfway between 60 and 99 is 79.5.
To check that our answer is correct, we subtract 60 from 79.5 and subtract 79.5 from 99 and compare the two numbers:
79.5 - 60 = 19.5
99 - 79.5 = 19.5
As you can see, the halfway number is 19.5 higher than 60 and 19.5 lower than 99. Therefore, our halfway between answer of 79.5 above is correct.
Halfway Between
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Halfway Between 60 and 100
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