When you ask "What number is halfway between 7 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=7 and Y=690.
To find the number halfway between 7 and 690, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 690 into our formula, we get:
(7 + 690)/2 = 348.5
Thus, the number halfway between 7 and 690 is 348.5.
To check that our answer is correct, we subtract 7 from 348.5 and subtract 348.5 from 690 and compare the two numbers:
348.5 - 7 = 341.5
690 - 348.5 = 341.5
As you can see, the halfway number is 341.5 higher than 7 and 341.5 lower than 690. Therefore, our halfway between answer of 348.5 above is correct.
Halfway Between
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Halfway Between 7 and 691
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