When you ask "What number is halfway between 7 and 670?" 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=670.
To find the number halfway between 7 and 670, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 670 into our formula, we get:
(7 + 670)/2 = 338.5
Thus, the number halfway between 7 and 670 is 338.5.
To check that our answer is correct, we subtract 7 from 338.5 and subtract 338.5 from 670 and compare the two numbers:
338.5 - 7 = 331.5
670 - 338.5 = 331.5
As you can see, the halfway number is 331.5 higher than 7 and 331.5 lower than 670. Therefore, our halfway between answer of 338.5 above is correct.
Halfway Between
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Halfway Between 7 and 671
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