When you ask "What number is halfway between 18 and 142?" 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=142.
To find the number halfway between 18 and 142, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 142 into our formula, we get:
(18 + 142)/2 = 80
Thus, the number halfway between 18 and 142 is 80.
To check that our answer is correct, we subtract 18 from 80 and subtract 80 from 142 and compare the two numbers:
80 - 18 = 62
142 - 80 = 62
As you can see, the halfway number is 62 higher than 18 and 62 lower than 142. Therefore, our halfway between answer of 80 above is correct.
Halfway Between
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Halfway Between 18 and 143
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