When you ask "What number is halfway between 42 and 427?" 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=427.
To find the number halfway between 42 and 427, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 427 into our formula, we get:
(42 + 427)/2 = 234.5
Thus, the number halfway between 42 and 427 is 234.5.
To check that our answer is correct, we subtract 42 from 234.5 and subtract 234.5 from 427 and compare the two numbers:
234.5 - 42 = 192.5
427 - 234.5 = 192.5
As you can see, the halfway number is 192.5 higher than 42 and 192.5 lower than 427. Therefore, our halfway between answer of 234.5 above is correct.
Halfway Between
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Halfway Between 42 and 428
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