When you ask "What number is halfway between 31 and 430?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=31 and Y=430.
To find the number halfway between 31 and 430, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 430 into our formula, we get:
(31 + 430)/2 = 230.5
Thus, the number halfway between 31 and 430 is 230.5.
To check that our answer is correct, we subtract 31 from 230.5 and subtract 230.5 from 430 and compare the two numbers:
230.5 - 31 = 199.5
430 - 230.5 = 199.5
As you can see, the halfway number is 199.5 higher than 31 and 199.5 lower than 430. Therefore, our halfway between answer of 230.5 above is correct.
Halfway Between
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Halfway Between 31 and 431
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