When you ask "What number is halfway between 42 and 218?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=218.
To find the number halfway between 42 and 218, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 218 into our formula, we get:
(42 + 218)/2 = 130
Thus, the number halfway between 42 and 218 is 130.
To check that our answer is correct, we subtract 42 from 130 and subtract 130 from 218 and compare the two numbers:
130 - 42 = 88
218 - 130 = 88
As you can see, the halfway number is 88 higher than 42 and 88 lower than 218. Therefore, our halfway between answer of 130 above is correct.
Halfway Between
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Halfway Between 42 and 219
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