When you ask "What number is halfway between 42 and 423?" 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=423.
To find the number halfway between 42 and 423, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 423 into our formula, we get:
(42 + 423)/2 = 232.5
Thus, the number halfway between 42 and 423 is 232.5.
To check that our answer is correct, we subtract 42 from 232.5 and subtract 232.5 from 423 and compare the two numbers:
232.5 - 42 = 190.5
423 - 232.5 = 190.5
As you can see, the halfway number is 190.5 higher than 42 and 190.5 lower than 423. Therefore, our halfway between answer of 232.5 above is correct.
Halfway Between
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Halfway Between 42 and 424
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