When you ask "What number is halfway between 10 and 549?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=10 and Y=549.
To find the number halfway between 10 and 549, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 549 into our formula, we get:
(10 + 549)/2 = 279.5
Thus, the number halfway between 10 and 549 is 279.5.
To check that our answer is correct, we subtract 10 from 279.5 and subtract 279.5 from 549 and compare the two numbers:
279.5 - 10 = 269.5
549 - 279.5 = 269.5
As you can see, the halfway number is 269.5 higher than 10 and 269.5 lower than 549. Therefore, our halfway between answer of 279.5 above is correct.
Halfway Between
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Halfway Between 10 and 550
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