When you ask "What number is halfway between 87 and 143?" 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=143.
To find the number halfway between 87 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 143 into our formula, we get:
(87 + 143)/2 = 115
Thus, the number halfway between 87 and 143 is 115.
To check that our answer is correct, we subtract 87 from 115 and subtract 115 from 143 and compare the two numbers:
115 - 87 = 28
143 - 115 = 28
As you can see, the halfway number is 28 higher than 87 and 28 lower than 143. Therefore, our halfway between answer of 115 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 87 and 144
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