When you ask "What number is halfway between 21 and 606?" 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=606.
To find the number halfway between 21 and 606, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 606 into our formula, we get:
(21 + 606)/2 = 313.5
Thus, the number halfway between 21 and 606 is 313.5.
To check that our answer is correct, we subtract 21 from 313.5 and subtract 313.5 from 606 and compare the two numbers:
313.5 - 21 = 292.5
606 - 313.5 = 292.5
As you can see, the halfway number is 292.5 higher than 21 and 292.5 lower than 606. Therefore, our halfway between answer of 313.5 above is correct.
Halfway Between
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Halfway Between 21 and 607
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