When you ask "What number is halfway between 42 and 245?" 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=245.
To find the number halfway between 42 and 245, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 245 into our formula, we get:
(42 + 245)/2 = 143.5
Thus, the number halfway between 42 and 245 is 143.5.
To check that our answer is correct, we subtract 42 from 143.5 and subtract 143.5 from 245 and compare the two numbers:
143.5 - 42 = 101.5
245 - 143.5 = 101.5
As you can see, the halfway number is 101.5 higher than 42 and 101.5 lower than 245. Therefore, our halfway between answer of 143.5 above is correct.
Halfway Between
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Halfway Between 42 and 246
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