When you ask "What number is halfway between 86 and 178?" 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=178.
To find the number halfway between 86 and 178, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 178 into our formula, we get:
(86 + 178)/2 = 132
Thus, the number halfway between 86 and 178 is 132.
To check that our answer is correct, we subtract 86 from 132 and subtract 132 from 178 and compare the two numbers:
132 - 86 = 46
178 - 132 = 46
As you can see, the halfway number is 46 higher than 86 and 46 lower than 178. Therefore, our halfway between answer of 132 above is correct.
Halfway Between
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Halfway Between 86 and 179
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