When you ask "What number is halfway between 42 and 553?" 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=553.
To find the number halfway between 42 and 553, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 553 into our formula, we get:
(42 + 553)/2 = 297.5
Thus, the number halfway between 42 and 553 is 297.5.
To check that our answer is correct, we subtract 42 from 297.5 and subtract 297.5 from 553 and compare the two numbers:
297.5 - 42 = 255.5
553 - 297.5 = 255.5
As you can see, the halfway number is 255.5 higher than 42 and 255.5 lower than 553. Therefore, our halfway between answer of 297.5 above is correct.
Halfway Between
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Halfway Between 42 and 554
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