When you ask "What number is halfway between 10 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=10 and Y=307.
To find the number halfway between 10 and 307, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 307 into our formula, we get:
(10 + 307)/2 = 158.5
Thus, the number halfway between 10 and 307 is 158.5.
To check that our answer is correct, we subtract 10 from 158.5 and subtract 158.5 from 307 and compare the two numbers:
158.5 - 10 = 148.5
307 - 158.5 = 148.5
As you can see, the halfway number is 148.5 higher than 10 and 148.5 lower than 307. Therefore, our halfway between answer of 158.5 above is correct.
Halfway Between
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Halfway Between 10 and 308
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