When you ask "What number is halfway between 71 and 158?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=71 and Y=158.
To find the number halfway between 71 and 158, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 71 and 158 into our formula, we get:
(71 + 158)/2 = 114.5
Thus, the number halfway between 71 and 158 is 114.5.
To check that our answer is correct, we subtract 71 from 114.5 and subtract 114.5 from 158 and compare the two numbers:
114.5 - 71 = 43.5
158 - 114.5 = 43.5
As you can see, the halfway number is 43.5 higher than 71 and 43.5 lower than 158. Therefore, our halfway between answer of 114.5 above is correct.
Halfway Between
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Halfway Between 71 and 159
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