When you ask "What number is halfway between 84 and 649?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=649.
To find the number halfway between 84 and 649, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 649 into our formula, we get:
(84 + 649)/2 = 366.5
Thus, the number halfway between 84 and 649 is 366.5.
To check that our answer is correct, we subtract 84 from 366.5 and subtract 366.5 from 649 and compare the two numbers:
366.5 - 84 = 282.5
649 - 366.5 = 282.5
As you can see, the halfway number is 282.5 higher than 84 and 282.5 lower than 649. Therefore, our halfway between answer of 366.5 above is correct.
Halfway Between
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Halfway Between 84 and 650
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