When you ask "What number is halfway between 86 and 357?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=86 and Y=357.
To find the number halfway between 86 and 357, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 357 into our formula, we get:
(86 + 357)/2 = 221.5
Thus, the number halfway between 86 and 357 is 221.5.
To check that our answer is correct, we subtract 86 from 221.5 and subtract 221.5 from 357 and compare the two numbers:
221.5 - 86 = 135.5
357 - 221.5 = 135.5
As you can see, the halfway number is 135.5 higher than 86 and 135.5 lower than 357. Therefore, our halfway between answer of 221.5 above is correct.
Halfway Between
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Halfway Between 86 and 358
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