When you ask "What number is halfway between 88 and 909?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=909.
To find the number halfway between 88 and 909, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 909 into our formula, we get:
(88 + 909)/2 = 498.5
Thus, the number halfway between 88 and 909 is 498.5.
To check that our answer is correct, we subtract 88 from 498.5 and subtract 498.5 from 909 and compare the two numbers:
498.5 - 88 = 410.5
909 - 498.5 = 410.5
As you can see, the halfway number is 410.5 higher than 88 and 410.5 lower than 909. Therefore, our halfway between answer of 498.5 above is correct.
Halfway Between
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Halfway Between 88 and 910
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