When you ask "What number is halfway between 21 and 970?" 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=970.
To find the number halfway between 21 and 970, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 970 into our formula, we get:
(21 + 970)/2 = 495.5
Thus, the number halfway between 21 and 970 is 495.5.
To check that our answer is correct, we subtract 21 from 495.5 and subtract 495.5 from 970 and compare the two numbers:
495.5 - 21 = 474.5
970 - 495.5 = 474.5
As you can see, the halfway number is 474.5 higher than 21 and 474.5 lower than 970. Therefore, our halfway between answer of 495.5 above is correct.
Halfway Between
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Halfway Between 21 and 971
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