When you ask "What number is halfway between 21 and 302?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=302.
To find the number halfway between 21 and 302, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 302 into our formula, we get:
(21 + 302)/2 = 161.5
Thus, the number halfway between 21 and 302 is 161.5.
To check that our answer is correct, we subtract 21 from 161.5 and subtract 161.5 from 302 and compare the two numbers:
161.5 - 21 = 140.5
302 - 161.5 = 140.5
As you can see, the halfway number is 140.5 higher than 21 and 140.5 lower than 302. Therefore, our halfway between answer of 161.5 above is correct.
Halfway Between
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Halfway Between 21 and 303
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