When you ask "What number is halfway between 42 and 197?" 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=197.
To find the number halfway between 42 and 197, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 197 into our formula, we get:
(42 + 197)/2 = 119.5
Thus, the number halfway between 42 and 197 is 119.5.
To check that our answer is correct, we subtract 42 from 119.5 and subtract 119.5 from 197 and compare the two numbers:
119.5 - 42 = 77.5
197 - 119.5 = 77.5
As you can see, the halfway number is 77.5 higher than 42 and 77.5 lower than 197. Therefore, our halfway between answer of 119.5 above is correct.
Halfway Between
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Halfway Between 42 and 198
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