When you ask "What number is halfway between 4 and 669?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=669.
To find the number halfway between 4 and 669, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 669 into our formula, we get:
(4 + 669)/2 = 336.5
Thus, the number halfway between 4 and 669 is 336.5.
To check that our answer is correct, we subtract 4 from 336.5 and subtract 336.5 from 669 and compare the two numbers:
336.5 - 4 = 332.5
669 - 336.5 = 332.5
As you can see, the halfway number is 332.5 higher than 4 and 332.5 lower than 669. Therefore, our halfway between answer of 336.5 above is correct.
Halfway Between
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Halfway Between 4 and 670
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