When you ask "What number is halfway between 9 and 253?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=253.
To find the number halfway between 9 and 253, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 253 into our formula, we get:
(9 + 253)/2 = 131
Thus, the number halfway between 9 and 253 is 131.
To check that our answer is correct, we subtract 9 from 131 and subtract 131 from 253 and compare the two numbers:
131 - 9 = 122
253 - 131 = 122
As you can see, the halfway number is 122 higher than 9 and 122 lower than 253. Therefore, our halfway between answer of 131 above is correct.
Halfway Between
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Halfway Between 9 and 254
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