When you ask "What number is halfway between 21 and 352?" 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=352.
To find the number halfway between 21 and 352, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 352 into our formula, we get:
(21 + 352)/2 = 186.5
Thus, the number halfway between 21 and 352 is 186.5.
To check that our answer is correct, we subtract 21 from 186.5 and subtract 186.5 from 352 and compare the two numbers:
186.5 - 21 = 165.5
352 - 186.5 = 165.5
As you can see, the halfway number is 165.5 higher than 21 and 165.5 lower than 352. Therefore, our halfway between answer of 186.5 above is correct.
Halfway Between
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Halfway Between 21 and 353
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