When you ask "What number is halfway between 42 and 253?" 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=253.
To find the number halfway between 42 and 253, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 253 into our formula, we get:
(42 + 253)/2 = 147.5
Thus, the number halfway between 42 and 253 is 147.5.
To check that our answer is correct, we subtract 42 from 147.5 and subtract 147.5 from 253 and compare the two numbers:
147.5 - 42 = 105.5
253 - 147.5 = 105.5
As you can see, the halfway number is 105.5 higher than 42 and 105.5 lower than 253. Therefore, our halfway between answer of 147.5 above is correct.
Halfway Between
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Halfway Between 42 and 254
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