When you ask "What number is halfway between 21 and 346?" 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=346.
To find the number halfway between 21 and 346, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 346 into our formula, we get:
(21 + 346)/2 = 183.5
Thus, the number halfway between 21 and 346 is 183.5.
To check that our answer is correct, we subtract 21 from 183.5 and subtract 183.5 from 346 and compare the two numbers:
183.5 - 21 = 162.5
346 - 183.5 = 162.5
As you can see, the halfway number is 162.5 higher than 21 and 162.5 lower than 346. Therefore, our halfway between answer of 183.5 above is correct.
Halfway Between
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Halfway Between 21 and 347
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