When you ask "What number is halfway between 11 and 670?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=670.
To find the number halfway between 11 and 670, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 670 into our formula, we get:
(11 + 670)/2 = 340.5
Thus, the number halfway between 11 and 670 is 340.5.
To check that our answer is correct, we subtract 11 from 340.5 and subtract 340.5 from 670 and compare the two numbers:
340.5 - 11 = 329.5
670 - 340.5 = 329.5
As you can see, the halfway number is 329.5 higher than 11 and 329.5 lower than 670. Therefore, our halfway between answer of 340.5 above is correct.
Halfway Between
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Halfway Between 11 and 671
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