When you ask "What number is halfway between 18 and 130?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=130.
To find the number halfway between 18 and 130, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 130 into our formula, we get:
(18 + 130)/2 = 74
Thus, the number halfway between 18 and 130 is 74.
To check that our answer is correct, we subtract 18 from 74 and subtract 74 from 130 and compare the two numbers:
74 - 18 = 56
130 - 74 = 56
As you can see, the halfway number is 56 higher than 18 and 56 lower than 130. Therefore, our halfway between answer of 74 above is correct.
Halfway Between
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Halfway Between 18 and 131
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