When you ask "What number is halfway between 10 and 231?" 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=231.
To find the number halfway between 10 and 231, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 231 into our formula, we get:
(10 + 231)/2 = 120.5
Thus, the number halfway between 10 and 231 is 120.5.
To check that our answer is correct, we subtract 10 from 120.5 and subtract 120.5 from 231 and compare the two numbers:
120.5 - 10 = 110.5
231 - 120.5 = 110.5
As you can see, the halfway number is 110.5 higher than 10 and 110.5 lower than 231. Therefore, our halfway between answer of 120.5 above is correct.
Halfway Between
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Halfway Between 10 and 232
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