When you ask "What number is halfway between 100 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=100 and Y=747.
To find the number halfway between 100 and 747, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 100 and 747 into our formula, we get:
(100 + 747)/2 = 423.5
Thus, the number halfway between 100 and 747 is 423.5.
To check that our answer is correct, we subtract 100 from 423.5 and subtract 423.5 from 747 and compare the two numbers:
423.5 - 100 = 323.5
747 - 423.5 = 323.5
As you can see, the halfway number is 323.5 higher than 100 and 323.5 lower than 747. Therefore, our halfway between answer of 423.5 above is correct.
Halfway Between
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Halfway Between 100 and 748
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