When you ask "What number is halfway between 81 and 119?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=81 and Y=119.
To find the number halfway between 81 and 119, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 119 into our formula, we get:
(81 + 119)/2 = 100
Thus, the number halfway between 81 and 119 is 100.
To check that our answer is correct, we subtract 81 from 100 and subtract 100 from 119 and compare the two numbers:
100 - 81 = 19
119 - 100 = 19
As you can see, the halfway number is 19 higher than 81 and 19 lower than 119. Therefore, our halfway between answer of 100 above is correct.
Halfway Between
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Halfway Between 81 and 120
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