When you ask "What number is halfway between 1 and 100?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=1 and Y=100.
To find the number halfway between 1 and 100, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 100 into our formula, we get:
(1 + 100)/2 = 50.5
Thus, the number halfway between 1 and 100 is 50.5.
To check that our answer is correct, we subtract 1 from 50.5 and subtract 50.5 from 100 and compare the two numbers:
50.5 - 1 = 49.5
100 - 50.5 = 49.5
As you can see, the halfway number is 49.5 higher than 1 and 49.5 lower than 100. Therefore, our halfway between answer of 50.5 above is correct.
Halfway Between
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Halfway Between 1 and 101
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