When you ask "What number is halfway between 81 and 168?" 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=168.
To find the number halfway between 81 and 168, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 168 into our formula, we get:
(81 + 168)/2 = 124.5
Thus, the number halfway between 81 and 168 is 124.5.
To check that our answer is correct, we subtract 81 from 124.5 and subtract 124.5 from 168 and compare the two numbers:
124.5 - 81 = 43.5
168 - 124.5 = 43.5
As you can see, the halfway number is 43.5 higher than 81 and 43.5 lower than 168. Therefore, our halfway between answer of 124.5 above is correct.
Halfway Between
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Halfway Between 81 and 169
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