When you ask "What number is halfway between 75 and 155?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=75 and Y=155.
To find the number halfway between 75 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 155 into our formula, we get:
(75 + 155)/2 = 115
Thus, the number halfway between 75 and 155 is 115.
To check that our answer is correct, we subtract 75 from 115 and subtract 115 from 155 and compare the two numbers:
115 - 75 = 40
155 - 115 = 40
As you can see, the halfway number is 40 higher than 75 and 40 lower than 155. Therefore, our halfway between answer of 115 above is correct.
Halfway Between
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Halfway Between 75 and 156
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