When you ask "What number is halfway between 99 and 545?" 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=545.
To find the number halfway between 99 and 545, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 545 into our formula, we get:
(99 + 545)/2 = 322
Thus, the number halfway between 99 and 545 is 322.
To check that our answer is correct, we subtract 99 from 322 and subtract 322 from 545 and compare the two numbers:
322 - 99 = 223
545 - 322 = 223
As you can see, the halfway number is 223 higher than 99 and 223 lower than 545. Therefore, our halfway between answer of 322 above is correct.
Halfway Between
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Halfway Between 99 and 546
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