When you ask "What number is halfway between 67 and 820?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=67 and Y=820.
To find the number halfway between 67 and 820, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 67 and 820 into our formula, we get:
(67 + 820)/2 = 443.5
Thus, the number halfway between 67 and 820 is 443.5.
To check that our answer is correct, we subtract 67 from 443.5 and subtract 443.5 from 820 and compare the two numbers:
443.5 - 67 = 376.5
820 - 443.5 = 376.5
As you can see, the halfway number is 376.5 higher than 67 and 376.5 lower than 820. Therefore, our halfway between answer of 443.5 above is correct.
Halfway Between
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