When you ask "What number is halfway between 2 and 153?" 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=153.
To find the number halfway between 2 and 153, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 153 into our formula, we get:
(2 + 153)/2 = 77.5
Thus, the number halfway between 2 and 153 is 77.5.
To check that our answer is correct, we subtract 2 from 77.5 and subtract 77.5 from 153 and compare the two numbers:
77.5 - 2 = 75.5
153 - 77.5 = 75.5
As you can see, the halfway number is 75.5 higher than 2 and 75.5 lower than 153. Therefore, our halfway between answer of 77.5 above is correct.
Halfway Between
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Halfway Between 2 and 154
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