When you ask "What number is halfway between 42 and 345?" 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=345.
To find the number halfway between 42 and 345, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 345 into our formula, we get:
(42 + 345)/2 = 193.5
Thus, the number halfway between 42 and 345 is 193.5.
To check that our answer is correct, we subtract 42 from 193.5 and subtract 193.5 from 345 and compare the two numbers:
193.5 - 42 = 151.5
345 - 193.5 = 151.5
As you can see, the halfway number is 151.5 higher than 42 and 151.5 lower than 345. Therefore, our halfway between answer of 193.5 above is correct.
Halfway Between
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Halfway Between 42 and 346
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