When you ask "What number is halfway between 4 and 307?" 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=307.
To find the number halfway between 4 and 307, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 307 into our formula, we get:
(4 + 307)/2 = 155.5
Thus, the number halfway between 4 and 307 is 155.5.
To check that our answer is correct, we subtract 4 from 155.5 and subtract 155.5 from 307 and compare the two numbers:
155.5 - 4 = 151.5
307 - 155.5 = 151.5
As you can see, the halfway number is 151.5 higher than 4 and 151.5 lower than 307. Therefore, our halfway between answer of 155.5 above is correct.
Halfway Between
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Halfway Between 4 and 308
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