When you ask "What number is halfway between 21 and 146?" 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=146.
To find the number halfway between 21 and 146, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 146 into our formula, we get:
(21 + 146)/2 = 83.5
Thus, the number halfway between 21 and 146 is 83.5.
To check that our answer is correct, we subtract 21 from 83.5 and subtract 83.5 from 146 and compare the two numbers:
83.5 - 21 = 62.5
146 - 83.5 = 62.5
As you can see, the halfway number is 62.5 higher than 21 and 62.5 lower than 146. Therefore, our halfway between answer of 83.5 above is correct.
Halfway Between
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Halfway Between 21 and 147
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