When you ask "What number is halfway between 21 and 176?" 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=176.
To find the number halfway between 21 and 176, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 176 into our formula, we get:
(21 + 176)/2 = 98.5
Thus, the number halfway between 21 and 176 is 98.5.
To check that our answer is correct, we subtract 21 from 98.5 and subtract 98.5 from 176 and compare the two numbers:
98.5 - 21 = 77.5
176 - 98.5 = 77.5
As you can see, the halfway number is 77.5 higher than 21 and 77.5 lower than 176. Therefore, our halfway between answer of 98.5 above is correct.
Halfway Between
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Halfway Between 21 and 177
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