When you ask "What number is halfway between 20 and 747?" 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=747.
To find the number halfway between 20 and 747, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 747 into our formula, we get:
(20 + 747)/2 = 383.5
Thus, the number halfway between 20 and 747 is 383.5.
To check that our answer is correct, we subtract 20 from 383.5 and subtract 383.5 from 747 and compare the two numbers:
383.5 - 20 = 363.5
747 - 383.5 = 363.5
As you can see, the halfway number is 363.5 higher than 20 and 363.5 lower than 747. Therefore, our halfway between answer of 383.5 above is correct.
Halfway Between
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Halfway Between 20 and 748
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