When you ask "What number is halfway between 31 and 190?" 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=190.
To find the number halfway between 31 and 190, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 31 and 190 into our formula, we get:
(31 + 190)/2 = 110.5
Thus, the number halfway between 31 and 190 is 110.5.
To check that our answer is correct, we subtract 31 from 110.5 and subtract 110.5 from 190 and compare the two numbers:
110.5 - 31 = 79.5
190 - 110.5 = 79.5
As you can see, the halfway number is 79.5 higher than 31 and 79.5 lower than 190. Therefore, our halfway between answer of 110.5 above is correct.
Halfway Between
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Halfway Between 31 and 191
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