When you ask "What number is halfway between 18 and 141?" 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=141.
To find the number halfway between 18 and 141, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 141 into our formula, we get:
(18 + 141)/2 = 79.5
Thus, the number halfway between 18 and 141 is 79.5.
To check that our answer is correct, we subtract 18 from 79.5 and subtract 79.5 from 141 and compare the two numbers:
79.5 - 18 = 61.5
141 - 79.5 = 61.5
As you can see, the halfway number is 61.5 higher than 18 and 61.5 lower than 141. Therefore, our halfway between answer of 79.5 above is correct.
Halfway Between
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