When you ask "What number is halfway between 87 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=87 and Y=346.
To find the number halfway between 87 and 346, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 346 into our formula, we get:
(87 + 346)/2 = 216.5
Thus, the number halfway between 87 and 346 is 216.5.
To check that our answer is correct, we subtract 87 from 216.5 and subtract 216.5 from 346 and compare the two numbers:
216.5 - 87 = 129.5
346 - 216.5 = 129.5
As you can see, the halfway number is 129.5 higher than 87 and 129.5 lower than 346. Therefore, our halfway between answer of 216.5 above is correct.
Halfway Between
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Halfway Between 87 and 347
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