When you ask "What number is halfway between 50 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=50 and Y=155.
To find the number halfway between 50 and 155, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 155 into our formula, we get:
(50 + 155)/2 = 102.5
Thus, the number halfway between 50 and 155 is 102.5.
To check that our answer is correct, we subtract 50 from 102.5 and subtract 102.5 from 155 and compare the two numbers:
102.5 - 50 = 52.5
155 - 102.5 = 52.5
As you can see, the halfway number is 52.5 higher than 50 and 52.5 lower than 155. Therefore, our halfway between answer of 102.5 above is correct.
Halfway Between
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Halfway Between 50 and 156
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