When you ask "What number is halfway between 87 and 350?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=350.
To find the number halfway between 87 and 350, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 350 into our formula, we get:
(87 + 350)/2 = 218.5
Thus, the number halfway between 87 and 350 is 218.5.
To check that our answer is correct, we subtract 87 from 218.5 and subtract 218.5 from 350 and compare the two numbers:
218.5 - 87 = 131.5
350 - 218.5 = 131.5
As you can see, the halfway number is 131.5 higher than 87 and 131.5 lower than 350. Therefore, our halfway between answer of 218.5 above is correct.
Halfway Between
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Halfway Between 87 and 351
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