When you ask "What number is halfway between 21 and 701?" 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=701.
To find the number halfway between 21 and 701, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 701 into our formula, we get:
(21 + 701)/2 = 361
Thus, the number halfway between 21 and 701 is 361.
To check that our answer is correct, we subtract 21 from 361 and subtract 361 from 701 and compare the two numbers:
361 - 21 = 340
701 - 361 = 340
As you can see, the halfway number is 340 higher than 21 and 340 lower than 701. Therefore, our halfway between answer of 361 above is correct.
Halfway Between
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Halfway Between 21 and 702
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