When you ask "What number is halfway between 99 and 506?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=99 and Y=506.
To find the number halfway between 99 and 506, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 506 into our formula, we get:
(99 + 506)/2 = 302.5
Thus, the number halfway between 99 and 506 is 302.5.
To check that our answer is correct, we subtract 99 from 302.5 and subtract 302.5 from 506 and compare the two numbers:
302.5 - 99 = 203.5
506 - 302.5 = 203.5
As you can see, the halfway number is 203.5 higher than 99 and 203.5 lower than 506. Therefore, our halfway between answer of 302.5 above is correct.
Halfway Between
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Halfway Between 99 and 507
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