When you ask "What number is halfway between 2 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=2 and Y=100.
To find the number halfway between 2 and 100, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 100 into our formula, we get:
(2 + 100)/2 = 51
Thus, the number halfway between 2 and 100 is 51.
To check that our answer is correct, we subtract 2 from 51 and subtract 51 from 100 and compare the two numbers:
51 - 2 = 49
100 - 51 = 49
As you can see, the halfway number is 49 higher than 2 and 49 lower than 100. Therefore, our halfway between answer of 51 above is correct.
Halfway Between
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Halfway Between 2 and 101
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