When you ask "What number is halfway between 69 and 843?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=843.
To find the number halfway between 69 and 843, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 843 into our formula, we get:
(69 + 843)/2 = 456
Thus, the number halfway between 69 and 843 is 456.
To check that our answer is correct, we subtract 69 from 456 and subtract 456 from 843 and compare the two numbers:
456 - 69 = 387
843 - 456 = 387
As you can see, the halfway number is 387 higher than 69 and 387 lower than 843. Therefore, our halfway between answer of 456 above is correct.
Halfway Between
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Halfway Between 69 and 844
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