When you ask "What number is halfway between 87 and 169?" 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=169.
To find the number halfway between 87 and 169, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 169 into our formula, we get:
(87 + 169)/2 = 128
Thus, the number halfway between 87 and 169 is 128.
To check that our answer is correct, we subtract 87 from 128 and subtract 128 from 169 and compare the two numbers:
128 - 87 = 41
169 - 128 = 41
As you can see, the halfway number is 41 higher than 87 and 41 lower than 169. Therefore, our halfway between answer of 128 above is correct.
Halfway Between
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Halfway Between 87 and 170
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