When you ask "What number is halfway between 74 and 321?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=74 and Y=321.
To find the number halfway between 74 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 74 and 321 into our formula, we get:
(74 + 321)/2 = 197.5
Thus, the number halfway between 74 and 321 is 197.5.
To check that our answer is correct, we subtract 74 from 197.5 and subtract 197.5 from 321 and compare the two numbers:
197.5 - 74 = 123.5
321 - 197.5 = 123.5
As you can see, the halfway number is 123.5 higher than 74 and 123.5 lower than 321. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 74 and 322
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