When you ask "What number is halfway between 7 and 630?" 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=630.
To find the number halfway between 7 and 630, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 630 into our formula, we get:
(7 + 630)/2 = 318.5
Thus, the number halfway between 7 and 630 is 318.5.
To check that our answer is correct, we subtract 7 from 318.5 and subtract 318.5 from 630 and compare the two numbers:
318.5 - 7 = 311.5
630 - 318.5 = 311.5
As you can see, the halfway number is 311.5 higher than 7 and 311.5 lower than 630. Therefore, our halfway between answer of 318.5 above is correct.
Halfway Between
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