When you ask "What number is halfway between 42 and 545?" 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=545.
To find the number halfway between 42 and 545, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 545 into our formula, we get:
(42 + 545)/2 = 293.5
Thus, the number halfway between 42 and 545 is 293.5.
To check that our answer is correct, we subtract 42 from 293.5 and subtract 293.5 from 545 and compare the two numbers:
293.5 - 42 = 251.5
545 - 293.5 = 251.5
As you can see, the halfway number is 251.5 higher than 42 and 251.5 lower than 545. Therefore, our halfway between answer of 293.5 above is correct.
Halfway Between
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Halfway Between 42 and 546
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