When you ask "What number is halfway between 7 and 822?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=822.
To find the number halfway between 7 and 822, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 822 into our formula, we get:
(7 + 822)/2 = 414.5
Thus, the number halfway between 7 and 822 is 414.5.
To check that our answer is correct, we subtract 7 from 414.5 and subtract 414.5 from 822 and compare the two numbers:
414.5 - 7 = 407.5
822 - 414.5 = 407.5
As you can see, the halfway number is 407.5 higher than 7 and 407.5 lower than 822. Therefore, our halfway between answer of 414.5 above is correct.
Halfway Between
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Halfway Between 7 and 823
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