When you ask "What number is halfway between 49 and 690?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=49 and Y=690.
To find the number halfway between 49 and 690, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 49 and 690 into our formula, we get:
(49 + 690)/2 = 369.5
Thus, the number halfway between 49 and 690 is 369.5.
To check that our answer is correct, we subtract 49 from 369.5 and subtract 369.5 from 690 and compare the two numbers:
369.5 - 49 = 320.5
690 - 369.5 = 320.5
As you can see, the halfway number is 320.5 higher than 49 and 320.5 lower than 690. Therefore, our halfway between answer of 369.5 above is correct.
Halfway Between
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Halfway Between 49 and 691
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