When you ask "What number is halfway between 21 and 374?" 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=374.
To find the number halfway between 21 and 374, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 374 into our formula, we get:
(21 + 374)/2 = 197.5
Thus, the number halfway between 21 and 374 is 197.5.
To check that our answer is correct, we subtract 21 from 197.5 and subtract 197.5 from 374 and compare the two numbers:
197.5 - 21 = 176.5
374 - 197.5 = 176.5
As you can see, the halfway number is 176.5 higher than 21 and 176.5 lower than 374. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 21 and 375
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