When you ask "What number is halfway between 20 and 761?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=761.
To find the number halfway between 20 and 761, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 761 into our formula, we get:
(20 + 761)/2 = 390.5
Thus, the number halfway between 20 and 761 is 390.5.
To check that our answer is correct, we subtract 20 from 390.5 and subtract 390.5 from 761 and compare the two numbers:
390.5 - 20 = 370.5
761 - 390.5 = 370.5
As you can see, the halfway number is 370.5 higher than 20 and 370.5 lower than 761. Therefore, our halfway between answer of 390.5 above is correct.
Halfway Between
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Halfway Between 20 and 762
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