When you ask "What number is halfway between 30 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=30 and Y=649.
To find the number halfway between 30 and 649, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 649 into our formula, we get:
(30 + 649)/2 = 339.5
Thus, the number halfway between 30 and 649 is 339.5.
To check that our answer is correct, we subtract 30 from 339.5 and subtract 339.5 from 649 and compare the two numbers:
339.5 - 30 = 309.5
649 - 339.5 = 309.5
As you can see, the halfway number is 309.5 higher than 30 and 309.5 lower than 649. Therefore, our halfway between answer of 339.5 above is correct.
Halfway Between
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Halfway Between 30 and 650
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