When you ask "What number is halfway between 20 and 957?" 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=957.
To find the number halfway between 20 and 957, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 957 into our formula, we get:
(20 + 957)/2 = 488.5
Thus, the number halfway between 20 and 957 is 488.5.
To check that our answer is correct, we subtract 20 from 488.5 and subtract 488.5 from 957 and compare the two numbers:
488.5 - 20 = 468.5
957 - 488.5 = 468.5
As you can see, the halfway number is 468.5 higher than 20 and 468.5 lower than 957. Therefore, our halfway between answer of 488.5 above is correct.
Halfway Between
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Halfway Between 20 and 958
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