When you ask "What number is halfway between 20 and 613?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=613.
To find the number halfway between 20 and 613, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 613 into our formula, we get:
(20 + 613)/2 = 316.5
Thus, the number halfway between 20 and 613 is 316.5.
To check that our answer is correct, we subtract 20 from 316.5 and subtract 316.5 from 613 and compare the two numbers:
316.5 - 20 = 296.5
613 - 316.5 = 296.5
As you can see, the halfway number is 296.5 higher than 20 and 296.5 lower than 613. Therefore, our halfway between answer of 316.5 above is correct.
Halfway Between
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Halfway Between 20 and 614
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